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JP2023113213A |
To provide a frequency modulation device and frequency modulation method, capable of reducing noise generated in the frequency modulation device and noise contained in a demodulation signal due to non-linearity of a voltage-controlled os...
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JP2023043722A |
To generate desired amplitude modulation data even if the amplitude of input data is not constant.An amplitude modulation circuit 1 which generates modulation data obtained by modulating input data input from the outside includes: a dete...
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JP7222858B2 |
An amplifier includes a first circuitry, a second circuitry, and a plurality of amplifier circuitries. The first circuitry controls an enable signal. The second circuitry controls a bias signal. Circuitries which output signals are decid...
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JP2023505071A |
A wideband tunable frequency single subband converter is proposed. The wideband frequency tunable converter operates within a wideband and tunable frequency range and has process, voltage and temperature (PVT) tracking capability. In one...
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JP7200540B2 |
To reduce influences to the broadcast quality even in a case where a plurality of amplifiers in an amplitude modulation device are broken.An amplitude modulation device 1 comprises: power amplifiers 11a to 11h; a carrier wave distributor...
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JP2023000336A |
To provide a modulation device and a modulation method capable of generating a wideband FM signal by suppressing frequency variation with a low cost electric component.According to the present invention, a modulation device includes a mu...
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JP2022093938A |
To reduce the fluctuation of the center frequency of an FM modulation signal output by a digital FM modulator without storing the correction value of the center frequency in a storage element.A digital FM modulator includes a first multi...
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JP2022077290A |
To generate an amplitude modulation signal with high linearity and reduced distortion.An amplitude modulation circuit 100 includes: input terminals 62a, 62b for receiving a main signal; an input terminal 61 for receiving a sub signal; ou...
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JP6903499B2 |
To secure reliability by reducing stress of a power amplifier even if an antenna base enters a short-circuit state.A digital amplitude modulation device according to an embodiment is configured to perform power amplification of a carrier...
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JP6903234B2 |
A frequency modulation oscillation source (100) comprises: a voltage-controlled oscillator (5) in which oscillation frequency is controlled on the basis of a modulation control voltage generated by integrating a comparison result signal ...
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JP6856677B2 |
To provide a vector modulator directly controlled by a digital signal without digital-to-analog signal conversion.A vector modulator 10 includes: an orthogonal component generation unit 12 for generating an input in-phase signal Iand an ...
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JP6773759B2 |
A circuit for generating a modulated signal in a transmitter of an integrated circuit is disclosed. The circuit comprises a transmitter driver circuit having a first current path for receiving a first input signal of a pair of differenti...
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JP6704788B2 |
To detect abnormality reliably even when a synthesis section is short-circuited.The synthesis section of a digital amplitude modulation device synthesizes the outputs from multiple power amplifiers in the ON control state, and outputs a ...
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JP6700555B2 |
A shift control circuit includes a first limiter circuit, a phase shifter, a first suppressor, and a reducer. The first limiter circuit limits the amplitude of a control target signal input from a microphone, having undergone A-D convers...
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JP6665100B2 |
A clock modulator can include two configurable delay units and can receive a baseband signal and a clock signal. The two configurable delay units can generate two delayed clock signals, each with different delay amounts. The delay amount...
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JP6591010B2 |
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JP6584860B2 |
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JP6535380B1 |
The present disclosure provides a reflective modulator comprising a coupler, two diodes and two DC block units. A coupler is an input terminal used to output an output signal, an output terminal used to output an output signal, a first l...
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JP6497640B2 |
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JP6494888B2 |
A first frequency accumulator (7a) operates using an output signal of a variable frequency divider (3) as a clock. A second frequency accumulator (7b) operates using a reference signal from a reference signal source (1) as a clock. A com...
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JP6440911B1 |
The mixer according to the present invention is for VGA12, which amplifies the signal of one in-phase input of the two-divided IF band with a gain cosθ, and for the signal of the other in-phase input of the two-divided IF band. Output f...
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JP6419429B2 |
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JP2018137805A |
To provide a transmitter capable of suppressing generation of unnecessary even harmonic components when synthesizing in-phase component and quadrature component using one SCPA (Switched Capacitor Power Amplifier), and a transmission meth...
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JP6330594B2 |
A filter apparatus has a first filter and a second filter. The first filter receives at least an up signal of a non-linear signal of which a single cycle is a predetermined period that includes an up interval and a down interval. In the ...
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JP6287986B2 |
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JP6254198B2 |
A communications system using a phase locked loop employing two-point modulation is disclosed. The phase locked loop further includes a master oscillator having an output operably coupled to a first input of the phase detector; a slave o...
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JP6211325B2 |
A quadrature modulator includes a first switched capacitor power amplifier that amplifies a first high-frequency signal, a second switched capacitor power amplifier that amplifies a second high-frequency signal, a first combiner which in...
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JP2017175520A |
To provide a highly convenient modulator.A modulator is configured to receive, as input, a first signal corresponding to one of a positive signal and a negative signal which constitute a baseband signal of a differential signal, and a se...
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JP6177057B2 |
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JP6121809B2 |
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JP6078133B1 |
[Subject] A distribution pattern circuit which decreased a disclosure loss of LO signal transmission track is provided. [Means for Solution] Data signal transmission track 1 which transmits a data signal which modulates a local oscillati...
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JP6034996B1 |
The device and method of generating, receiving and calibrating a signal accompanied by quadrature modulation and frequency conversion are provided. The embodiment of the present invention provides very wide bandwidth, high spectral purit...
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JP5987265B1 |
This application considers a digital value as an input, and provides the electric power output circuit containing an efficient low distorted electric power output circuit and an abnormal-conditions machine directly connectable with an an...
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JP5980817B2 |
A two point modulation digital phase locked loop circuit is disclosed. The circuit includes a sampling clock input that is switchable between a plurality of frequencies. The circuit also includes a sigma-delta modulator in a feedback pat...
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JP5954672B2 |
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JP2016127310A |
To provide a device and a method capable of enhancing the reduction effect of radiated electromagnetic noise.A clock signal generation device includes detection means 12 for detecting the phase difference between an inputted reference cl...
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JP5935978B2 |
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JP2016063508A |
To provide a technique for simplifying constitution while achieving modulation and acceleration of channel selection.An oscillation device 100 includes a DAC 10, a first diode 16, a second diode 18, a voltage reducing circuit 22, a VCO 1...
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JP5905641B2 |
An ultra-wide band frequency modulator is disclosed. The frequency modulator includes a direct modulation phase lock loop that receives a small component. The frequency modulator also includes a delay module that produces a plurality of ...
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JP5894985B2 |
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JP5893696B2 |
A communications system using a phase locked loop employing two-point modulation is disclosed. The phase locked loop further includes a master oscillator having an output operably coupled to a first input of the phase detector; a slave o...
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JP5876736B2 |
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JP5852074B2 |
A communications system using a phase locked loop employing two-point modulation is disclosed. The phase locked loop further includes a master oscillator having an output operably coupled to a first input of the phase detector; a slave o...
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JP5851421B2 |
An electronic device controlling a frequency modulation index has a frequency modulation index control loop having an input adapted to be connected to a frequency output of a frequency controllable oscillator. The oscillator has a center...
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JP2016500956A |
A wireless device includes an antenna and a polar modulation transmitter coupled to the antenna and configured for two-point modulation, the transmitter being the data input, the multiplier coupled to the data input, and the multiplicati...
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JP2015198282A |
To provide a compact and inexpensive acoustic FM transmitter having high frequency control accuracy, by enabling FM modulation using a fractional-N type PLL circuit.An acoustic FM transmitter 1 for transmitting an acoustic signal while p...
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JP5775228B2 |
A method of modulating an infrared headphone interface signal includes providing a first audio signal having an analog audio value. A memory is provided having a plurality of locations and containing digital phase offset values. A clock ...
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JP2015159443A |
To provide an FM transmission circuit capable of automating adjustment of an oscillation frequency.An FM transmission circuit includes: a microphone 8 which picks up a sound and outputs an analog audio signal corresponding to the sound; ...
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JP5762723B2 |
A modulation circuit includes a load and a transistor serving as a switch. The transistor has an oxide semiconductor layer in which hydrogen concentration is 5×1019/cm3 or less. The off-state current of the transistor is 1×10−13 A or...
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JP2015142187A |
To provide a communication device of FM system in which adjustment of an amplitude correction circuit can be automated.A microphone 8 includes an amplifier 9 for amplifying a voice signal outputted from the microphone 8, an FM modulation...
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