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7532044 |
Photodetector
An I/F converter 10 contained in a photodetector is provided with a first comparing portion 11 1 , a second comparing portion 11 2 , a current mirror circuit 14 , an SR type flip-flop circuit ...
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7479824 |
Dual mode voltage supply circuit
A dual mode voltage supply circuit ( 50 ) includes an active mode voltage supply circuit ( 58 ) and a passive mode voltage supply circuit ( 60 ). The active mode voltage supply circuit ( 58 ) is...
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7394296 |
Apparatus and method for automatically offsetting linear deviation of V/F converter
An apparatus and method for automatically offsetting the linear deviation of a V/F converter, the offset adjust pin of which is connected to a fixed resistance, and the frequency output pin of...
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7332944 |
Frequency-controllable oscillator
A frequency-controllable oscillator, having an oscillation device in which the oscillation frequency is controlled on the basis of a feedback current or voltage; a constant current source circuit;...
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7279941 |
Voltage-frequency conversion apparatus and method of changing reference voltage thereof
A voltage-frequency conversion apparatus which comprises a variable current source for charging a capacitor; a current amount adjustment circuit which has a first resistor for applying a first...
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7263344 |
Method for reducing IM2 noise in a down conversion circuit
The present invention relates generally to communications, and more specifically to a method and apparatus for minimizing DC offset and second-order modulation products (IM2 noise) while...
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7262640 |
Voltage-frequency conversion apparatus
A voltage-frequency conversion apparatus which has a variable current source for charging a capacitor; a current amount adjustment unit that adjusts a current amount of the variable current source...
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7256623 |
Frequency programmable feed-forward oscillator and triangle wave generator
A frequency programmable feed forward oscillator and triangular wave generator is disclosed having a first input for receiving an input voltage and a second input for receiving an input current....
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7209015 |
Oscillator circuit having a temperature dependence
An oscillator circuit includes a current source for generating a current depending on the ambient temperature, a plurality of oscillators for oscillating at respective periods depending on the...
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7202712 |
Multiphase resonant pulse generators
A multiphase resonant pulse generator ( 74 ) has N groups of N−1 switches ( 44,46,48 ) which, when activated, form N paths from a power supply (Vdc) to ground or a reference voltage. Here N is a...
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7106109 |
Biasing circuit and voltage control oscillator thereof
A biasing circuit and a voltage control oscillator thereof are provided. The biasing circuit comprises a compensation circuit, a delay circuit and a comparison circuit. In the biasing circuit, the...
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7078940 |
Current comb generator
The current comb generator periodically applies current spikes to a power supply signal in the time domain to produce a series of current spikes at different frequencies in the frequency domain.
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7075345 |
Frequency converter having low supply voltage
A frequency converter converts a first current signal having a first frequency into a second current signal having a second frequency different fro the first frequency. The frequency converter...
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7069117 |
Electrical power distribution control systems and processes
In one aspect, the present invention includes a power adjustment apparatus. The apparatus includes a local controller and one or more sensors distributed within a power grid. The sensors are...
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7061296 |
Circuit arrangement for generating a digital clock signal
A circuit arrangement for generating a digital clock signal which manages without a crystal oscillator and has a low current consumption. The circuit arrangement includes: a transistor circuit...
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7057423 |
Current-voltage transforming circuit employing limiter circuit
A current-voltage transforming circuit used with a photo detector integrated circuit includes a photo detector to detect a photo signal (laser beam signal) to generate a photo current, an amplifier...
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7050478 |
Apparatus and method for synchronizing clock modulation with power supply modulation in a spread spectrum clock system
A spread spectrum clock system ( 11 ) modulates the supply voltage for a circuit ( 10 ) in concert with the circuit clock frequency (C). The system increases the supply voltage for the circuit ( 10...
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6995618 |
VCO feedback loop to reduce phase noise
A phase adjustment module in a voltage controlled oscillator (VCO) samples a VCO oscillation to detect changes in the oscillation frequency and produces a corresponding correction voltage that is...
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6954088 |
Voltage controlled oscillator (VCO) with amplitude control
A structure and associated method for controlling an amplitude of oscillation in a voltage controlled oscillator. The voltage controlled oscillator circuit comprises a drive circuit, an...
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6949962 |
Device for reducing the lag and the dark current in a particle detector, in particular a photon detector
The assembly formed by the amplifier 34 , the transistor 36 and the capacitor 28 fulfills the function of the amplifier 8 and the impedance 10 of the device shown in FIG. 4.
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6915442 |
Precision-controlled duty cycle clock circuit
A clock signal duty cycle control circuit is provided that receives an incoming signal from a clock signal input source and generates an improved output clock signal having an accurately controlled...
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6812757 |
Phase lock loop apparatus
A phase lock loop circuit including a voltage controlled oscillator and a phase detector having a sampling circuit and a linear voltage-to-current converter to create a control voltage for the...
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6809557 |
Increasing power supply noise rejection using linear voltage regulators in an on-chip temperature sensor
An apparatus that uses a linear voltage regulator to reject power supply noise in a temperature sensor is provided. Further, a method for using a linear voltage regulator to reject power supply...
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6762629 |
VCC adaptive dynamically variable frequency clock system for high performance low power microprocessors
A method and an apparatus for dynamically varying a clock frequency in a processor to adapt to VCC voltage changes. The method of one embodiment includes sampling a supply voltage at a plurality of...
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6696868 |
Frequency to frequency de-randomizer circuit
A frequency to frequency de-randomizer 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...
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6653872 |
Multi-channel precision synchronous voltage-to-frequency converter
A multi-channel synchronous voltage-to-frequency converter (SVFC) realized in an integrated semiconductor circuit. The multi-channel SVFC having an operational amplifier adapted to receive an...
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6636085 |
Phase shifter with an RC polyphase filter
There is disclosed a phase shifter using a polyphase filter, which achieves a broad band, suppresses errors in both amplitude and phase, and achieves low power consumption. A driving section...
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6578154 |
Clock duty cycle correction circuit which corrects an input clock by directly comparing the input clock with a reference clock generated by the output clock
A clock signal duty cycle control circuit is provided that receives an incoming signal from a clock signal input source and generates an improved output clock signal having an accurately controlled...
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6552579 |
Fuel gauge power switch with current sense
A new current sense circuit is achieved. The circuit comprises, first, an output transistor having gate, source, and drain. The drain is coupled to a load, the source is coupled to a power rail,...
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6507227 |
Device and method for monitoring current delivered to a load
The device and method monitor the current delivered to a load through a power transistor including a sense transistor. The circuit includes a disturbances attenuating circuit that has a...
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6452427 |
Dual output capacitance interface circuit
A dual output capacitance interface circuit ( 100 ) based on switched capacitor circuits and charge subtraction technique provides both voltage output ( 104 ) and frequency output ( 106 ). The...
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6441671 |
Digital trim capacitor programming
A programming method ( 250 ) for digitally programming the adjustment of an electronic trim capacitor ( 212, 314, 414 ). In an initial step ( 252 ), programming is initiated by setting an enable...
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6414522 |
Bias generating circuit for use with an oscillating circuit in an integrated circuit charge pump
In an improved charge pump bias generating circuit for a charge pump for a semiconductor integrated circuit device, the pump has a bias generator which has an input for receiving a pump enable...
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6392399 |
Device for measurement of the electrical consumption of a portable data- or signal-processing terminal
The device for measurement of current exchanged between a battery ( 1 ) and electrical circuits ( 19 ) of a portable telephone includes a current sensor ( 21 ), connecting the battery ( 1 ) to the...
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6388597 |
&Dgr -&Sgr modulator and &Dgr -&Sgr A/D converter
A Δ-Σ converter comprises a Δ-Σ modulator and a digital filter. The Δ-Σ modulator has a comparator having two resonant tunnel diodes connected to each other in series between two terminals...
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6388248 |
Control voltage isolation system for electrical rotating apparatus utilizing fiber optics and associated method
An isolation system is provided for generating a control voltage in a low voltage control system that is representative of the input voltage in a high voltage power system of an excitation system,...
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6369620 |
Cross coupled transmitter output stage
A cross coupled output stage for a transmitter. It is desirable to have high impedance for a differential cascode output stage of an externally terminated transmitter in order to improve return...
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6295413 |
Digitizing circuit of light amount receiving from strobe and control circuit of light amount emitted from strobe
A circuit that digitizes a quantity of light received from a strobe according to the present invention, includes: a photoelectric conversion device that receives light from the strobe and generates...
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6262609 |
Closed-loop voltage-to-frequency converter
A closed-loop voltage-to-frequency (V/F) converter includes a voltage-controlled-oscillator (VCO) placed in a feedback voltage-locked loop (VLL). This converter achieves both wide bandwidth (for...
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6222466 |
Apparatus and a method for keyboard encoding
The invention is related to a method and a device for use in an apparatus, preferably a portable radiotelephone, equipped with a number of keys. Upon activation of a key, the device detects which...
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6188252 |
Horizontal oscillation circuit capable of changing frequency
A frequency detection circuit detects the frequency of a horizontal sync signal, and generates a mode switching signal corresponding to the detected frequency. A voltage-controlled oscillator...
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6181190 |
Electronic circuit and manufacturing method for electronic circuit
The conductance may be adjusted of an electronic circuit including a first electronic component having a nominal conductance with a given inaccuracy. The circuit includes at least one additional...
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6169428 |
Single supply voltage to frequency converter optimized for low voltage sensing above and below ground
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...
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6137346 |
Temperature tracking voltage to current converter
A programmable and precise voltage-to-current converter (a.k.a. current source) that tracks temperature variations is presented. The voltage-to-current converter is implemented by placing a voltage...
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6107845 |
Frequency control circuit for oscillator and method therefor
A frequency control circuit for an oscillator and a method therefor are disclosed and which frequency control circuit includes a flash cell having a cell transistor, a switching unit for outputting...
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6078209 |
System and method for controlled performance degradation in electronic circuits
A system and method for altering the effective operating frequency of an electronic system (e.g., an IC) in response to changes in temperature or current provides controlled and deliberate...
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6041372 |
Method and apparatus for providing a processor module for a computer system
A method and apparatus for converting a signal from a first voltage level to a second voltage level before providing the signal to a processor. A circuit board includes an interface for coupling...
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6011426 |
Substrate voltage generation circuit for semiconductor device
A substrate voltage generation circuit for a semiconductor device which is capable of decreasing the amount of current consumed by a charge pump. The circuit includes a burn-in detection unit for...
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6008748 |
Microwave phase logic implementations of an analog-to-digital converter
An N-bit analog to biphase-encoded analog-to digital converter, which comprises (1) a biphase amplitude modulator responsive to an analog signal and a microwave pump carrier frequency f c for...
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5973519 |
Voltage controlled oscillator circuit capable of switching between oscillation frequency bands
A voltage controlled oscillator circuit having a negative resistance section for supplying electric power to the voltage controlled oscillator circuit and a parallel resonance circuit includes a...
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