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Patent Searching and Data


Matches 401 - 450 out of 3,386

Document Document Title
WO/2003/003713A1
A fully digital pulse width modulator substantially doubles resolution in a laser printer by outputting data to the laser on both the rising and falling edges of the clock cycle. A counter and the clock itself are used to select input to...  
WO/2002/080350A1
An RF power oscillator for contactless card antennas shapes a carrier signal at the operating frequency utilizing a delay circuit having a number of taps for delaying the carrier signal by different lengths of time. The delayed signals a...  
WO/2002/078184A2
A pulse-width modulation technique uses a counter load value that alternates between a duty-cycle defining value and its complement. In one embodiment, a pulse-width modulated signal is produced as a function of a control signal used to ...  
WO/2002/075923A2
A linear voltage-to-duty cycle converter is disclosed in which an input voltage to be converted is transformed to a triangle wave signal which has up and down ramps whose slopes are variable with the input voltage. A hysteresis comparato...  
WO/2002/065640A1
A wireless digital transmission and receiving method combines phase reversal keying with pulse position modulation. Modulation of a transmitted signal implements pulses that are of extremely short duration to indicate ones and zeros (22)...  
WO/2002/060060A1
A circuit and method for generating a pulse width modulated signal (510) is disclosed. The circuit includes a clock that generates a clock signal having a plurality of clock pulses, the clock pulses being spaced by weighted intervals dur...  
WO/2002/023736A1
A circuit (12) for recovering a current sense signal which is offset by a common mode displacement, such is the case when the signal is the voltage across a current sense resistor located on the high side bus or between the switches of a...  
WO/2002/017491A1
The invention relates to a clock-pulse generation circuit comprising a clock-pulse generator (1) for outputting a basic clock pulse, a pulse contractor (2), connected downstream of the clock-pulse generator (1), for generating pulses tha...  
WO2000070762A9
An analog voltage is used to directly alter the timebase of a pulse-width converter, thereby modifying a digitally-generated system output with an analog source. The input to the amplifier is coupled to a first counter (101) clocked by a...  
WO/2001/071914A1
A method of generating a pulse width modulated (PWM) signal comprises: receiving digital demand data V¿control? comprising at least one more significant bit (bit¿7? to bit?14¿) and at least one less significant bit (bit¿0? to bit¿6?...  
WO/2001/029997A1
A system and method of creating a pulse train signal (B) of a pulse width modulator (102) whose fundamental frequency is time-varying is disclosed. A power source (124) is connected to the pulse width generator. A binary counter has an i...  
WO/2001/013518A1
A chaotic carrier pulse position modulation communication system and method is disclosed. The system includes a transmitter (12) and receiver (14) having matched chaotic pulse regenerators (16, 18). The chaotic pulse regenerator in the r...  
WO/2001/008307A1
The invention relates to an electronic drive control mechanism for controlling a drive coil of a contactor, said coil having a pulse-width signal that is generated by an arithmetic unit, and a static switch. The aim of the invention is t...  
WO/2000/077958A1
A method for wireless data transmission, whereby signal pulses are generated and transmitted by keying an electromagnetic carrier, characterized in that the data bits which are to be transmitted are coded to each other by signal pulse (2...  
WO/2000/065716A1
A high voltage linear current sense integrated circuit includes a differential amplifier circuit (30) that can amplify a differential signal in the hundreds of millivolts near the power supply. In addition, a constant current using oppos...  
WO/2000/059114A1
A pulse width modulation scheme allows the creation of a unipolar pulse width modulated output signal. Two switching circuits (104, 204), preferably different legs of an inverter circuit, can operate to not only modulate an input voltage...  
WO/2000/049713A1
A digital pulse width modulation circuit (300) and method includes a first pulse width clock signal (fh) modulated by a second pulse width clock signal (fv) that represents a converted analog voltage input. The first and second pulse wid...  
WO/2000/021278A1
An arrangement for producing a variable width pulse is disclosed for use in an electrostatic printing mechanism which is adapted to produce greyscale intensity of a pixel to be printed based on predetermined digital data. The variable wi...  
WO/2000/021190A1
A frequency to frequency de-randomiser circuit having means for smoothing a current which comprises a diode filter configured so as to have a time constant which changes in response to changes in the current thus providing a rapidly resp...  
WO/2000/001067A2
Systems and methods can provide, in one aspect, a method for modulating the pulse width of control signals generated on a plurality of separate channels. In one practice, the methods described herein are suitable for execution on a micro...  
WO/1999/063362A1
The invention relates to a sampler control device (1) for sampling an echo signal formed by a returning transmit pulse, comprising a clock generator (2) that periodically triggers a first pulse former (3) for transmit pulses, in addition...  
WO/1999/048205A1
In a double-side pulse width modulator (10), an amplifier (12), a first bank of storage elements (16-1 to 16-8), a first bank of switches (18-1 to 18-8), a feedback storage element (22), a first timing switch (20), a comparator (14), a s...  
WO/1999/048204A1
The invention relates to a circuit for controlling a pulse width modulator in a switched-mode power supply. Said circuit comprises a difference building stage (DBS) acting as a regulator for generating a differential signal (DS) composed...  
WO/1999/045641A1
In a method and an amplifier for the compensation of unlinearities e.g. of the class D type, wherein an audio signal is pulse-width modulated, e.g. with a carrier wave signal in the form of a triangular signal to provide a pulse-width mo...  
WO/1999/040680A1
A modulator loop (700) designed to operate in a frequency range of interest is described. The loop (704) includes a loop output terminal and a switching stage, the output of which is coupled to the loop output terminal. The switching sta...  
WO/1999/033161A1
The invention relates to a method for influencing the electrical power of a load (10) with a pulse width modulated signal (13) which incorporates the specification of a continuous switch-on signal. According to the inventive method, the ...  
WO/1999/019983A1
A voltage to frequency converter using a charge pump to restore the output voltage of the input integrator. The charge pump implementation allows the voltage to frequency converter's input to sense voltage above and below ground with a s...  
WO/1999/013574A1
A low power current-to-frequency converter circuit provides an output frequency signal $i(F)¿OUT? having a frequency that varies as a function of a low level analog input current signal. The analog input current signal is typically gene...  
WO/1998/056115A1
A method of and apparatus for the conversion of a frequency modulated signal to a digital output are disclosed. The output of the converter is a triangularly weighted sum of the number of zero crossings of the F.M. signal in each sub-sam...  
WO/1998/036493A2
The invention relates to a method of correcting the shape error of a symbol caused by the use of pulse-density modulation. According to the invention, to each symbol is summed a correction signal adapted to correct the error of said symbol.  
WO/1998/027648A1
An apparatus which outputs very low duty cycle pulses of a consistent width. It is common to use a pulse width modulator as part of a liquid crystal display dimming system to vary the brightness. In the typical pulse width modulating sch...  
WO/1998/024203A1
The invention relates to a transit modulator for jittering a signal (U�in?) with a storage (3), a pulse generator (2) coupled to the storage (3) generating a non-jittered read pulse (T) and an additional pulse generator (5) coupled to ...  
WO/1997/044899A1
A logic circuit (2) converts signals, C=[Cn-1, Cn-2, ..., C1, C0] generated by a ring counter (1) into continuous triangular signals Q, in which the carrier frequency of PWM signals is the second power of the frequency of the signal C, a...  
WO/1997/042703A1
A clock signal is dithered for reducing interference to radio receiving equipment. This is accomplished by frequency modulating a clock signal produced in a phase locked loop circuit (U1) with white noise from a noise generator (101), to...  
WO/1996/035157A1
A method of demodulating a waveform modulated by an m-ary signaling technique receives the waveform (40) to form a received signal. The received signal is sampled at a plurality of discrete times to form a sequence of received samples (4...  
WO/1996/031086A1
A loudspeaker has a digital input signal port connected to a digital interpolator to increase the effective sampling rate whose output is fed to a signal delay and magnitude detector after which the short-term dynamic range of the input ...  
WO/1996/015590A1
A method and apparatus are shown for generating and transmitting very short and widely separated high frequency sine-wave pulses of electromagnetic energy into space. A transistor (TR3), a charging capacitor (C8), and an inductor (L1) ar...  
WO/1996/013893A1
An input voltage-controlled pulse generator (VCO-PWM) for driving a timed converter or switching component with a variable pulse/pause ratio and a set maximum test degree and variable clock frequency.  
WO/1995/034941A1
A pulse width modulator (PWM) circuit for generating pulses to enable a driver control unit to drive a pair of switching circuits for an electric motor including an input section for receiving an N bit digitized input signal to be modula...  
WO/1995/032550A2
The invention relates to a method and an apparatus for forming a pulse amplitude modulated signal in association with digital modulation. In the method symbols to be transmitted are formed from bits of an incoming bit stream (D-IN). In o...  
WO/1994/011955A1
An adaptive data rate modulator/demodulator (modem) (102), particularly useful for transmitting data over fading communications channels, uses an adaptive data rate technique which supports multiple data rates in the same device. The mod...  
WO/1993/025000A1
A ramp generator (108) generates a ramp signal having a ramp portion; a latch signal generator (110) provides a latch signal coincident with the ramp portion; an indicator circuit (116, 134) indicates the desired width of a pulse to be g...  
WO/1993/025002A1
A dynamically selectable multimode pulse width modulation system (100) includes ramp generator means (108) for generating a ramp; pulse edge modulation means (106) responsive to the ramp generator means (108) for defining a leading edge ...  
WO/1993/025001A1
An anti-false triggering system for a pulse width modulation system includes a ramp generator (108) for generating a ramp signal having a ramp portion and a rest portion; a latch enable signal generator (110) for providing a latch enable...  
WO/1993/024999A1
A dual edge pulse width modulation system including a ramp generator (108) for generating a voltage ramp; an n bit digital to analog converter (102, 104) having a normal and an inverted output for establishing a leading edge and a traili...  
WO/1993/022151A1
A modular control means for an electrically driven vehicle in which modules (2, 12-18) are interconnected by a serial data bus (10). One line (26) of the serial data bus (10) may be biased high or low by modules of the system (2, 12-18) ...  
WO/1993/017491A1
An FM signal demodulation circuit capable of demodulating higher frequencies while maintaining linearity in the input and output signals. A first differential amplifier circuit (DA1) is supplied with an FM signal of one phase and a const...  
WO/1993/014563A1
An improved digital switching amplifier is disclosed. The amplifier utilizes a low-pass filter (LPF) at the input of the switching comparator (U1) to give an improved signal to noise ratio at the final output (Vf). In another aspect of t...  
WO/1993/010598A1
A device for modifying the pulse duty factor or the pulse number density of a signal sequence has a ramp generator (10) and a first storage (12) with a stored value that predetermines the pulse duty factor or the pulse number density. Ou...  
WO/1993/009599A2
A two-step analog-to-digital converter (300) and BiCMOS fabrication method to make the converter. The fabrication method provides pseudosubstrate isolation of digital CMOS devices from analog devices. The converter uses NPN current switc...  

Matches 401 - 450 out of 3,386