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Patent Searching and Data


Matches 451 - 500 out of 4,538

Document Document Title
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 ...  
WO/1987/003434A1
Serial information bits are represented by a signal which alternates between two levels and remains at each level for a time representative of the information bit being represented. The serial bits are produced by sampling of a set of pa...  
WO/1986/007509A1
An apparatus for controllably producing a duty cycle modulated DC signal in response to receiving an analog voltage signal is useful, for example, in sensing mechanical motion and providing a responsive digital signal for use in a contro...  
WO/1986/007219A1
A phase modulator comprises an integrator (1) arranged to provide an output voltage (V) which can be changed from an initial level (V1), means (3) operative to effect change, at a time dependent upon receipt by the phase modulator of a c...  
WO/1985/004293A1
A control circuit having a drive circuit that operates in response to pulse-width modulated control signals to control a unit to be controlled. A first d-c voltage level is applied by a bias circuit (15) to an analog control signal. A tr...  
WO/1985/001847A1
The circuit arrangement of the current-impulse converter with variable time constant includes a digital gate, a feedback tag, a control capacitor and a charging capacitor, electronic switches connected serially to control capacitors. The...  
WO/1985/000257A1
Method for reading the signal to be detected according to the signal value and independently from the frequency range, as well as circuitry for implementing such method. The method according to the present invention is characterized in t...  
WO/1984/001244A1
Apparatus for converting an analog-format electrical signal or quantity (such as the magnitude of an electrical circuit element) into a corresponding pulse-format signal, preferably in the form of a train of periodic pulses the lenghts o...  
WO/1983/004148A1
A circuit for changing the frequency of a pulse train (10) in response to a change in the average value of an applied digital signal (18) applies the signal to be changed to a pulse subtractor (12). Application of a predetermined number ...  
WO/1982/002462A1
CVSD modulation is detected by applying a digital signal containing CVSD information to a digital filter (12) that is in the CVSD loop. The digital filter includes voltage-operated switches (40) that switch one of two voltages to a resis...  
WO/1981/001084A1
A circuit arrangement for an asynchronous motor drive of controlled stepping, i.e. for control of the number of revolutions of asynchronous squirrel-cage motors, in which the output of the supply unit is connected to a potentiometer, the...  
WO/1980/002457A1
A converter (photodiode 1) exposed to solar radiation (2) provides a d.c. current proportionnal to the radiation, charging a charge capacitor (3). This capacitor is connected at the input (11) of an analogue-digital switch (12) which pro...  
WO/1980/000206A1
Precision integrator with incremental outputs of the type comprising an operational amplifier mounted as an integrator, an analogue adder which does the summing up of currents I1, I2 at the input of the integrator, caracterized in that t...  
JP2019161648A
[Subject] A processor combined with a system memory device so that communication was possible generates a Pulse-Density-Modulation (PWM) signal. [Means for Solution] By a processor, a low-speed clock rate is used for a method, it calcula...  
JP2019153840A
[Subject] An object of present invention is to generate a signal of highly precise PWM with which generating of a tone was controlled. [Means for Solution] The first creating means that generates a waveform of PWM from pattern data of ab...  
JP6562758B2  
JP2019126120A
To provide a motor driver control device which suppresses reduction in accuracy of motor control and improves noise resistance by suppressing fluctuation in duty of a PWM pulse signal with fluctuation in voltage value of a power source u...  
JP6529128B2  
JP2019087849A
To provide a PWM signal output device capable of appropriately performing current limitation even when a PWM duty reaches 100%.A current limit logic 4 of a PWM signal output device 1 activates a current limit signal to hold the state whe...  
JP6516929B2  
JP6476049B2  
JP2019016974A
To provide electronic control equipment capable of changing the output level of a PWM signal to a direction fixed level, according to an instant output fixed request, upon receiving the instant output fixed request.A PWM output circuit 1...  

Matches 451 - 500 out of 4,538