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WO/2012/015509A1 |
A Gaussian Frequency Shift Key (GFSK) receiver includes a receiver front end to receive a GFSK-modulated signal and convert the received GFSK-modulated signal to a baseband frequency modulated signal, a channel filter to reduce channel i...
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WO/2012/006899A1 |
A Low Noise block (LNB) down conversion chip circuit is disclosed. The solution performs a down conversion on a radio frequency signal utilizing a quadrature local oscillation signal and a quadrature mixer, and then performs a 90 degrees...
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WO/2012/002026A1 |
This invention is applied to a frequency converter for use in a receiver. The frequency converter comprises: an LO signal generator (11) that generates and outputs an LO signal; and a mixer (10) that multiplies a received signal, which h...
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WO/2012/002023A1 |
Disclosed is a frequency converter which is used in a receiver. The frequency converter comprises: an LO signal generator (11) which generates and outputs an LO signal; and a mixer (10) which outputs a frequency-converted signal obtained...
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WO/2011/157665A1 |
A conversion circuit (20) for converting a complex analog input signal having an in-phase, I, component and a quadrature-phase, Q, component resulting from frequency down conversion of a radio-frequency, RF, signal (XRF) to a frequency b...
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WO/2011/156607A1 |
Disclosed are circuits, techniques and methods for removing one or more harmonics from a waveform that has been mixed with a local oscillator. In one particular example, such a waveform may also be mixed with a second local oscillator at...
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WO/2011/141572A1 |
In radiofrequency technology, so-called subharmonic mixers are known for mixing a useful signal with a radiofrequency signal, with a local oscillator being used for said mixers, the local oscillator generating a local oscillator signal h...
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WO/2011/138697A1 |
Digital IQ imbalance compensation is utilized for a dual-carrier double conversion receiver. First, the effect of IQ imbalance on OFDM-based digital baseband is analyzed, showing that, in the presence of IQ imbalance, the baseband signal...
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WO/2011/136415A1 |
The present invention relates to a low-power, highly integrated ASK demodulator. The ASK demodulator according to one embodiment of the present invention comprises: a half wave rectifier for half-wave rectifying a received signal; an env...
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WO/2011/128881A2 |
A method and system for performing complex sampling of signals by using two or more sampling channels and for calculating time delays between these channels. According to certain embodiments of the presently disclosed subject matter, the...
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WO/2011/124533A1 |
A mixer with a calibration circuit. The mixer has a signal input port for a signal to be up- converted or down-converted; a local oscillator input port; and an output port. The mixer is for use in a transmitter or receiver in which the s...
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WO/2011/121663A1 |
The disclosed receiver device (1) is equipped with a rectifying unit (10) which is provided with rectifying elements (Q9 and Q10) for rectifying a received signal that has been input; bias supply units (Q1 to Q8, C1 to C4, 14, and 15) fo...
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WO/2011/116822A1 |
A phase detector (100, 400, 800) comprising a balun (150) and input ports (116) at each of the balun's balanced ports. The phase detector (100, 400, 800) has four devices (105, 115, 110, 155) for measuring a signal's amplitude: - a first...
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WO/2011/114393A1 |
An analog complex filter (101) synthesizes an in-phase signal (I0) and a quadrature signal (Q0) to output analog signals (I1, Q1). Analog/digital converters (102i, 102q) convert the analog signals (I1, Q1) to digital signals (I2, Q2). A ...
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WO/2011/109913A1 |
The invention relates to an apparatus (300; 400; 500; 600) for demodulating an input signal (306; 402; 520), comprising a frequency detector (302; 403; 502.1,..., 502. N; 603) for tracking a frequency (f2; fd1,..., fdN) of the input sign...
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WO/2011/106633A1 |
A wireless communications device, e.g., a mobile node supporting direct peer to peer communications, performs a self-calibration of one or more of: receiver IQ imbalance, transmitter IQ imbalance, receiver DC offset, and transmitter DC o...
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WO/2011/103108A1 |
A spectral transform system includes a first path having a signal input, a signal output, and an adjustable first path signal scaling block. A second path is connected to the forward path between the signal input and the signal output. T...
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WO/2011/101305A1 |
In a method of frequency down-converting an input signal to an output signal, a first local oscillator signal is generated as a square wave having a duty cycle of 1/3 or 2/3, and the input signal is mixed with the first oscillator signal...
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WO/2011/101289A1 |
A clock generator circuit generates a wanted RF clock signal by using an up-converter, a spurious tone cancellation circuit, a controller, and at least two clock driver/dividers. The spurious tone cancellation circuit includes a tone det...
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WO/2011/084527A2 |
Techniques for decimating a first periodic signal to generate a second periodic signal. In an exemplary embodiment, the first periodic signal is divided by a configurable integer ratio divider, and the output of the divider is delayed by...
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WO/2011/082481A1 |
Methods and systems for processing signals wherein a plurality of signals are received at the inputs of a plurality of transconductance circuits which convert the signals into their corresponding current signals. The current signals are ...
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WO/2011/081582A1 |
The present invention relates to an automatic gain control method and block 30 for controlling a signal level of a signal at a predetermined location in a signal path 17 of a receiver chain. The automatic gain controller 30 is comprising...
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WO/2011/081616A1 |
An apparatus for decoding digital data includes a processor to create a priori information for insertion to a maximum a posteriori (MAP) decoder. The processor detects locations of symbols in the input data stream and reads ROM data corr...
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WO/2011/070013A2 |
A mixer arrangement (1) for generating an analog output signal of the mixer arrangement (1) by mixing an analog input signal of the mixer arrangement (1) with a discrete-time mixing signal. The mixer arrangement comprises a plurality of ...
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WO/2011/069209A1 |
This invention concerns a sub-harmonic homodyne mixer suitable for operation at the millimetre waveband (MMW); for instance the 60 GHz RF radio band. The mixer comprises: A first pair of transistors connected together with common source ...
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WO/2011/069229A1 |
A virtual Weaver architecture filter is implemented using a sampling mixer that successively processes samples of the input signal in round-robin fashion and provides a sum of the samples as multiplied by coefficients emulating quadratur...
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WO/2011/071546A1 |
A multiphase clock generates pulses at a rate much higher than the clock frequency.
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WO/2011/062278A1 |
Disclosed is an electronic circuit, which is provided with a first hybrid circuit (10), and a second hybrid circuit (20). A first diode (D1) and a second diode (D2) are respectively connected to the first distribution terminal (T1) and t...
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WO/2011/061703A1 |
Method for distributing data signals within a building comprising the steps of : - receiving data signals, each transmitted on a carrier; frequency- converting the received data signals using a first plurality of oscillators with a first...
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WO/2011/058863A1 |
Provided is a mixer circuit for solving the problem that a circuit becomes very complicated in order to compensate the amplitude error and the phase error. A voltage current conversion unit (11) converts an RF signal, which is a voltage ...
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WO/2011/047703A1 |
The present disclosure generally relates to the field of receiver structures in radio communication systems and more specifically to passive mixers in the receiver structure and to a technique for converting a first signal having a first...
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WO/2011/047354A1 |
An improved active or passive double balanced mixer with reduced capacitor voltage mismatch is described. The double balanced mixer includes two sets of mixer circuits, each comprised of switches. Each switch is separately divided into a...
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WO/2011/044846A1 |
A channel estimation method, apparatus and communication system are provided in the embodiments of the present invention. The channel estimation method includes the following steps: obtaining received signals, and the received signals in...
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WO/2011/032618A1 |
A mixer circuit comprises an input stage arranged to convert an input voltage signal received at an input of the mixer circuit into at least one current signal, and a frequency conversion stage comprising at least one switching element a...
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WO/2011/030120A1 |
A hybrid upconverter comprises a low noise amplifier (LNA) (32) and a two port parametric amplifier (35). The parametric amplifier (35) comprises a first port (21) to receive an input signal (13) to be amplified and upconverted and a sec...
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WO/2011/029742A1 |
The invention relates to coherent heterodyne THz receivers carried out in a series of variants. Mixers for THz receivers are generally constructed as Schottky diode mixers. Schottky diodes provide the highest cut-off frequencies in semic...
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WO/2011/029038A1 |
The mixer of a transmit chain of a wireless transmitter (such as the transmitter of a cellular telephone handset) is driven with low third harmonic in-phase (I) and quadrature (Q) signals. The low third harmonic I and Q signals have thre...
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WO/2011/027423A1 |
Provided is a frequency conversion device provided with a frequency conversion element that can support both a Si-based MMIC and a GaAs-based MMIC by using a magnetoresistance element. The frequency conversion device is provided with a ...
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WO/2011/025456A1 |
In an embodiment, a front-end transceiver may be provided. The front-end transceiver may include a receiver path, including a first receiver frequency converter configured to convert a received signal with a receiver frequency into a fir...
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WO/2011/024846A1 |
Disclosed is a detector device which is provided with: an amplifier (AMP1) which amplifies the voltage of an input electric signal and outputs the result; a first detector circuit (Det1) which outputs a first detection signal having a cu...
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WO/2011/020399A1 |
A radio frequency circuit structure for realizing the function of converting dual-frequency Global Positioning System (GPS) satellite signal into baseband signal includes: an antenna receiving functional module, a signal dividing functio...
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WO/2011/011647A1 |
In certain embodiments, a wireless communication link includes a wireless receiver that receives a circular polarized signal from a remotely configured transmitter. The circular polarized signal has a polarization vector that rotates at ...
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WO/2011/004737A1 |
Disclosed is an orthogonal mixer which does not require a long time to adjust the amplitude value when demodulating an IQ signal. The orthogonal mixer is characterised by the inclusion of: a first frequency-changing unit (12), which outp...
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WO/2011/004256A1 |
A passive implementation of an image reject mixer (IRM), capable of operating at very high frequency, is operative according to the disclosed method. The IRM comprises a quad MOS multiplier and a lumped-element hybrid, resulting in a pas...
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WO/2011/003094A1 |
Techniques for providing an efficient interface between a mixer block and a transconductance (Gm) block. In an exemplary embodiment, the output currents of at least two unit cells of the transconductance block are conductively coupled to...
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WO/2011/000600A1 |
The invention relates to a mixer assembly (10) for a radar sensor for motor vehicles, comprising an I-mixer (20) and a Q-mixer (22), which are connected in parallel branches (12, 14) between an oscillator port (LO) and an RF port (RF) by...
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WO/2011/003040A1 |
A local oscillator communicates a signal of relatively low frequency across an integrated circuit to the location of a mixer. Near the mixer, a frequency-multiplying SubHarmonically Injection-Locked Oscillator (SHILO) receives the signal...
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WO/2011/003092A1 |
Techniques for providing an efficient interface between a mixer block and a transconductance (Gm) block. In an exemplary embodiment, the output currents of at least two unit cells of the transconductance block are conductively coupled to...
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WO/2010/149405A1 |
Radar sensor having a mixer (12) for mixing a received signal with a reference signal, and having a device for compensating for interference signals (SE) which would overdrive the mixer, characterized in that the device for compensating ...
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WO/2010/149822A1 |
There is provided a solution for dual channel transmission in a radio communication device. Both transmission signals to be transmitted on different channels are mixed two times by using oscillator signals having the same frequencies for...
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