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Patent Searching and Data


Matches 451 - 500 out of 4,575

Document Document Title
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/2000/070762A1
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/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...  
WO2000001067A3
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/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...  
WO1998036493A3  
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.  
WO1995032550A3  
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...  
WO1993009599A3  
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...  
WO/1992/009187A1
Variable width pulse generator comprising an assembly of logic stages which are connected in cascade. Each stage is arranged in order to receive one signal amongst a set of clock signals with different phase and corresponding to one of t...  
WO/1991/020074A1
A drive circuit for a liquid crystal display converts a display information signal (203) to an n bit gray scale code to control the brightness at a prescribed pixel. A counter (220) receives the m most significant bits of the n bit gray ...  
WO/1991/007011A1
The coding scheme involves transmitting a series of pulses, the separations between successive pulses representing the same data. Even though the separations between successive pulses all represent the same data, the separations are all ...  
WO/1990/011646A1
A process and device for voltage-frequency conversion are useful for obtaining, by simple means, a rapid, high-precision voltage-frequency convertor with a large frequency sweep. To this end, the dicontinuous output signal of an integrat...  
WO/1989/000739A1
A multiphase multiplier circuit employs analog switches, each of which is duty controlled for multiplying input voltage signal with a multiplier determined depending on the duty cycle of ON/OFF period. The multiphase multiplier circuit f...  
WO/1988/002201A1
A system for companding digital audio signal samples processes the digital audio signal samples to correct errors induced by the compression and expansion processes. These errors are calculated prior to compressing the samples. The error...  
WO/1988/002199A1
A system and method for modulating a carrier signal wherein occurence of the peaks in the modulated carrier signal conveys clocking information and each transition of a modulated carrier signal includes two midrange characteristics, the ...  

Matches 451 - 500 out of 4,575