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Patent Searching and Data


Matches 101 - 150 out of 4,464

Document Document Title
WO/2007/072307A1
An electronic circuit comprises a delay circuit that with a chain of saw tooth delay stages (10a-d), coupled in a loop to form an oscillator for example. Each stage comprises an integrating circuit (104) and a current modulator (106) cou...  
WO/2007/058217A1
A first comparator (32) compares an output voltage (Vout) to appear in a capacitor (C2) with the maximum threshold voltage (Vmax). A second comparator (34) compares the output voltage (Vout) with the minimum threshold voltage (Vmin). An ...  
WO/2007/040814A1
A clock oscillator system for use in providing the switching regulator duty cycle control in a fixed frequency (no cycle skipping) operation is provided. In one embodiment, the circuit according to the invention uses an analog feedback l...  
WO/2006/117236A3
An oscillator according to the present invention reduces power consumption by enlarging the pulsewidth of an oscillator output pulse. Since this pulse disables an oscillator current source, the enlarged pulsewidth reduces the time the cu...  
WO/2006/137034A1
A pseudo-sine signal generation device (D) comprises i) a differential tunable integration means (SI) arranged to generate differential triangular signals (TS) with a chosen constant output amplitude from input differential square signal...  
WO2006112792A8
An apparatus for generating a monocycle comprises an input signal source (76) for providing an input signal, and a step recovery diode (SRD) (80) for receiving the input signal and producing an impulse. A shunt inductor (102) is provided...  
WO/2006/121065A1
A switching control IC (11) comprises a circuit generating a triangular wave at a frequency dependent on a capacitor (Co) connected with its CT terminal and a resistor (Ro) connected with its RT terminal. A circuit (10) for inputting a p...  
WO/2006/116710A2
A system and method are provided for driving a power field-effect transistor (FET). In one embodiment, a system comprises a control circuit (54) that generates a control signal (56) to provide a gate voltage of the power FET. The system ...  
WO/2006/112792A1
An apparatus for generating a monocycle comprises an input signal source (76) for providing an input signal, and a step recovery diode (SRD) (80) for receiving the input signal and producing an impulse. A shunt inductor (102) is provided...  
WO/2006/071197A1
Disclosed is a novel design of a fully integrated UWB transmitter. The transmitter includes a pulse generator, a pulse modulator, and an ultra-wideband drive amplifier. A new low voltage low power pulse generator circuit is disclosed whi...  
WO/2006/015884A1
The invention relates to a method of operating an electronic valve (18), in particular an IGBT, wherein a process of changing a charging state of a control electrode (17) (in particular of an insulated gate) of the valve (18) is repeated...  
WO/2005/114831A1
An oscillator includes a series of N number of gm/C stages. The pair of output terminals of each gm/C stage is coupled to the pair of input terminals of the next gm/C stage except the pair of output terminals of the last gm/C stage is cr...  
WO/2005/091502A1
The invention relates to control circuitry for controlling a power electronic circuit comprising a current path that runs through a power semiconductor and a feeder. According to the invention, the inductivity of the feeder and/or a comp...  
WO/2005/060131A1
A reactance adjustment device includes: an electrode (123) for inducing an electric field in an electric field transmission medium (121); a resonator (7) for adjusting the reactance value; and adjustment signal generator (13) for alterna...  
WO/2005/001938A1
A reduction in current consumption by a step-up voltage generating circuit of a semiconductor integrated circuit during a standby time. The semiconductor integrated circuit comprises a pump circuit which generates a step-up voltage by st...  
WO2004062104B1
A sawtooth wave generating apparatus 1 includes a base frequency generating section 10 and a frequency generating section 20 for generating the frequency of a reference signal, a sawtooth wave forming section 30 which forms a sawtooth wa...  
WO2004068708A3
A signal generator (1) for generating a square waveform analogue voltage output signal comprises an on-chip DAC (12) which outputs the analogue voltage signal on an output terminal (5). On-chip first and second programmable registers (9,...  
WO2004062104A3
A sawtooth wave generating apparatus 1 includes a base frequency generating section 10 and a frequency generating section 20 for generating the frequency of a reference signal, a sawtooth wave forming section 30 which forms a sawtooth wa...  
WO/2004/073161A1
An electronic class-D amplifier with intrinsically low distortion employing modulation of the slopes of a triangular-wave carrier reference signal; the modulation being in proportion to the derivative of the input signal. The negation of...  
WO/2004/070948A1
In a plurality of electronic devices, a triangular signal varying between an upper limit level and a lower limit level is generated by charging/discharging a capacitor. A detection signal is generated when the triangular signal becoming ...  
WO/2004/068708A2
A signal generator (1) for generating a square waveform analogue voltage output signal comprises an on-chip DAC (12) which outputs the analogue voltage signal on an output terminal (5). On-chip first and second programmable registers (9,...  
WO/2004/062104A2
A sawtooth wave generating apparatus 1 includes a base frequency generating section 10 and a frequency generating section 20 for generating the frequency of a reference signal, a sawtooth wave forming section 30 which forms a sawtooth wa...  
WO/2004/059930A1
A transmitter (4) for a controlled-shape switched signal on a communication line (1) comprises a signal generator including a capacitor (19) and a feedback loop responsive to a voltage across the capacitor (19) and to an input signal (TX...  
WO/2004/042926A1
A capacitive charge pump (111) that can be implemented in such devices as e.g. a phase locked loop (PLL) (105). The charge pump includes at least one capacitor (211, 217) in the charge path and discharge path for limiting the amount of c...  
WO/2004/040758A1
A transmitter (4) for a controlled-shape switched signal on a communication line (1) comprises a signal generator including a capacitor (19) producing the switched signal to be applied to the line. The capacitor is charged by a charging ...  
WO/2004/025825A1
The present invention comprises an integral triangular voltage waveform generator (170, 180) and triangular to pseudo-sinusoidal current waveform converter (170, 180). The outputs of the present invention are preferably differential (130...  
WO/2004/023654A1
An oscillator circuit (60) has a comparator circuit (68) and a monitor and control circuit (80). The comparator (68) provides a periodic output signal. The monitor and control circuit (80) controls the voltage swing of the periodic outpu...  
WO2003015278A3
The invention relates to a device for controlling a switch element (T1, T2), comprising a signal source (3, 5) linked with the control input of the switch element to produce a control signal, a measuring element (8, 10) for detecting a m...  
WO2003055071A9
The invention relates to a circuit arrangement for the provision of an output signal with adjustable flank pitch, whereby the several, parallel inverter output stages (5, 6; 7, 8; 9, 10; 11, 12) are connected in parallel on the load side...  
WO/2003/055071A1
The invention relates to a circuit arrangement for the provision of an output signal with adjustable flank pitch, whereby the several, parallel inverter output stages (5, 6; 7, 8; 9, 10; 11, 12) are connected in parallel on the load side...  
WO/2003/017463A1
A sample and hold circuit (28) for receiving a signal comprising a plurality of pulses at node LS from a sensing circuit (ru) and a circuit for supplying a timing signal (26) for the sample and hold circuit and the sample and hold circui...  
WO/2003/015278A2
The invention relates to a device for controlling a switch element (T1, T2), comprising a signal source (3, 5) linked with the control input of the switch element to produce a control signal, a measuring element (8, 10) for detecting a m...  
WO2002015382A3
An oscillator includes a first sawtooth waveform generator for generating a first sawtooth waveform having a selectively started ramp portion and a second sawtooth waveform generator for generating a second sawtooth waveform having a sel...  
WO/2002/091565A2
An analog signal amplifying method, an amplifier to output a first pulse of high level by comparing an input signal with a first sawtooth-wave having an amplitude greater than that of the input signal and determining that the first sawto...  
WO2002052533A3
A monitor deflection circuit includes a bipolar power transistor for applying power from a high voltage supply to a horizontal deflection coil. The monitor deflection circuit further includes a base drive circuit for selectively turning ...  
WO/2002/052533A2
A monitor deflection circuit includes a bipolar power transistor for applying power from a high voltage supply to a horizontal deflection coil. The monitor deflection circuit further includes a base drive circuit for selectively turning ...  
WO/2002/025816A1
The invention relates to a high-efficiency driver circuit for capacitive loads, which circuit comprises a drive portion (12) connected to at least one end (X) of a capacitive electric load (11) being applied a voltage waveform. Advantage...  
WO/2002/025815A1
The invention relates to an electric circuit for generating a periodic signal (CLK) comprising: a capacitor device (C), which has a first terminal (K1) and a second terminal (K2); a signal node (K3) that is connected, via a first switchi...  
WO/2002/015382A2
An oscillator includes a first sawtooth waveform generator for generating a first sawtooth waveform having a selectively started ramp portion and a second sawtooth waveform generator for generating a second sawtooth waveform having a sel...  
WO/2001/087020A1
A universal ballast control circuit allows a universal ballast to accommodate a gas discharge lamp within a relatively wide wattage range using a low-speed microcontroller. The control circuit drives the ballast to start, run and dim a p...  
WO/2001/082482A1
According to the invention, a frequency demultiplication circuit serves to generate wander or wander sequences having frequencies of less than 10 Hz and, in particular, less than 1 Hz. Said frequency demultiplication circuit receives, on...  
WO/2001/082483A1
In a waveform generator according to the first aspect of the invention, a repetitive non-linear waveform is generated by varying the number supplied to the pulse reduction circuit during the repetition period. Consequently, the pulse red...  
WO/2001/052413A1
An electronic circuit for switching an inductive load (10) by means of a bipolar transistor (1) whereby a switching signal is supplied to the base (5) of a switching transistor (1) via an LRC circuit (6, 7, 9). During switching off the L...  
WO2000041519B1
A secondary winding (LSEC) of a horizontal flyback transformer (IHVT) of a horizontal deflection circuit (20) develops a horizontal retrace pulse voltage (12). A secondary winding (43) of a second transformer (41) is coupled in series wi...  
WO/2001/026225A1
A current-controlled high frequency oscillator which includes an inverting logic gate (G1) having an input and an output (or, alternatively, three inverting logic gates connected in series), a fast diode (D1) connected between the input ...  
WO/2001/024191A1
A programmable reference voltage controls a high-voltage source via a programmable voltage divider. The programmable voltage divider scales a fixed reference voltage to a scaled reference value that is used to control the generation of a...  
WO/2001/010007A1
The invention relates to an electric circuit (10), in particular for a medium voltage power converter. The circuit (10) has at least four semiconductor switches (15, 16, 17, 18) which form a series connection and which are connected to p...  
WO/2001/003299A1
A power amplifier is provided with a novel triangle wave generator (4) in which a more precise triangle wave is produced with the aid of logic circuits. The resulting generator (4) is able to operate at higher frequencies. A fast current...  
WO2000041519A3
A secondary winding (LSEC) of a horizontal flyback transformer (IHVT) of a horizontal deflection circuit (20) develops a horizontal retrace pulse voltage (12). A secondary winding (43) of a second transformer (41) is coupled in series wi...  
WO2000041519A8
A secondary winding (LSEC) of a horizontal flyback transformer (IHVT) of a horizontal deflection circuit (20) develops a horizontal retrace pulse voltage (12). A secondary winding (43) of a second transformer (41) is coupled in series wi...  

Matches 101 - 150 out of 4,464