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5245229 |
Digitally controlled integrated circuit anti-clipping mixer
An anti-clipping mixer circuit is provided within an integrated circuit. The mixer circuit allows for the independent level control of each input signal, thereby allowing the optimization of the...
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5237286 |
Method and apparatus for generation of high frequency pulses
A method and apparatus for generation of high frequency pulses and for excitation of nuclear magnetic resonance of a sample generates a plurality of modurated high frequency waves having different...
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5221907 |
Pseudo logarithmic analog step adder
A signal to be scaled is supplied to three parallel amplifiers with gains of 0.1, 1, and 10, which each amplify the input simultaneously. The amplifiers are designed so that their output is limited...
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5151662 |
Circuit and method of signal differentiation
A differentiator circuit is provided with a subtracter circuit connected to the input and output of the final stage of a main signal processing filter, the latter of which processes an input signal...
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5136192 |
High speed measuring device utilizing logarithmic conversion
A measuring device comprises a detector (1) for a quantity x to be measured, which detector is adapted to produce two signals I 1 and I 2 which relate to x as x=(I 1 -I 2 )/(I 1 +I 2 ). The...
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5122757 |
Digital frequency generator
A digital frequency generator is formed from generators for fist and second clock signals which feed a frequency adder stage that produces an output having a frequency of the sum of the frequency...
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5107149 |
Linear, continuous-time, two quadrant multiplier
A linear voltage-to-current converter (LVCC) circuit includes two transistors, one P-channel and one N-channel. The input voltage is applied to the gates of both transistors. The drains of the two...
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5099156 |
Subthreshold MOS circuits for correlating analog input voltages
A first and a second MOS transistor of the same conductivity type are connected in series between a load and a fixed voltage source. The gates of the first and second MOS transistors are connected...
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5079511 |
Circuit arrangement with a transmitter system for path or angle dependent signals
A linear, path or angle dependent signal sequence (E) is formed from two path or angle dependent signals (A, B) of equal amplitude and period having an electrical phase offset to each other of 90°...
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5039891 |
Planar broadband FET balun
Three active FET baluns, using resonant, reactive and resistive/reactive compensation are disclosed suitable for monolithic implementation. A single balanced mixer configuration including a...
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4999521 |
CMOS analog multiplying circuit
A CMOS analog multiplying circuit comprising a first transistor (1) having its current electrodes coupled between a first reference voltage line and a first node and its gate electrode coupled to a...
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4939472 |
Integrating circuit
An integrating circuit is configured to feed a correlator output to a first integrating and dumping circuit and to a second integrating and dumping circuit and to subsequently add their respective...
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4939688 |
Dynamic range converter providing a multiplicity of conversion ratios
An electric signal converter utilizes a processing unit to establish a polynomial of n terms, each term being a power of the signal at the input terminal of the processor multiplied by an...
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4931674 |
Programmable analog voltage multiplier circuit means
An improved programmable analog voltage multiplier circuit means (PAVMCM) cluding various embodiments thereof that are operable in linear/nonlinear fashion. The PAVMCM is generally made up of...
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4882740 |
Frequency counter for counting a frequency and partly varied frequencies of a signal in real time
A frequency of a signal, particularly a frequency, partly varied as time passes, of a signal is counted in real time by producing a delay signal by delaying the signal as much as a predetermined...
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4864217 |
Method of and a circuit arrangement for processing sampled analogue electrical signals
A sampled analog electrical signal in the form of sample currents is processed by combining the input sample current in one sample period with sample currents derived from input sample currents in...
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4845389 |
Very high frequency mixer
A mixer of the two-transistor type (T 1 , T 2 ) arranged in series by a source S 2 and a drain D 1 . A Gate G 1 receives a radio frequency signal RF and a gate G 2 a local oscillator signal L0....
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4834504 |
LCD compensation for non-optimum voltage conditions
A liquid crystal display (LCD) compensation circuit, operating within a peak voltage limitation, serves to maximize the on/off voltage ratio applied to the LCD while at the same time meeting the...
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4833504 |
Single pass highlight color printer including a scavengeless developer housing
A magnetic brush developer apparatus comprising a plurality of developer housings each including a plurality of magnetic rolls associated therewith. The magnetic rolls disposed in a second...
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4780630 |
Double differential summing amplifier with four independent inputs
A double differential summing amplifier circuit with four independent inputs, having two equipotential supply lines L1 and L2 raised respectively to potentials -V and +V; four MOS amplifier...
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4761743 |
Dynamic system analysis in a vibrating beam accelerometer
A method and apparatus for measuring a dynamic effect applied to a vibrating beam accelerometer. The apparatus analyzes a pair of frequencies related to natural frequency as a function of a force...
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4754226 |
Switched capacitor function generator
An analog function generator useful in providing a variety of functions for analog signal processing applications includes a pulse width modulator and a switched capacitor operational amplifier....
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4743969 |
Correlator
An input signal comprising pulses in periodical intervals and being present as a series of digital sampling values is applied to a correlator for generating a correlator output signal which assumes...
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4739197 |
Process and arrangement for regulating the keying ratio of at least one electrical signal
A process and apparatus for use in digital length or angle measuring systems for regulating the keying ratio of at least one periodic electrical signal. A signal is produced, proportional to the...
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4730165 |
Non-linear signal processing apparatus
A non-linear signal processing apparatus used in a video tape recorder or a video disk player is disclosed. The time variation of an input signal or a processed version thereof is non-linearly...
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4705969 |
High accuracy tachometer circuit
A tachometer circuit is described that has a zero ripple d-c output that is directly proportional to the frequency. The circuit includes a pair of full wave rectifiers to act upon the sine and...
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4667180 |
Continuous time domain analog-digital converter
A continuous time domain parallel analog to digital converter is provided for accomplishing the general successive rectification algorithm I out =2│I in │-I ref . One stage of the continuous...
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4663292 |
High-voltage biological macromolecule transfer and cell fusion system
A high-voltage biological macromolecule transfer and cell fusion system for transforming a low input voltage into a high-voltage discharge output. The system comprises voltages source means, a...
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4636663 |
Double-balanced mixer circuit
A double-balanced RF mixer circuit comprising two differential amplifiers each of which comprises a pair of transistors the emitters of which are connected in common and the bases of which are...
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4636654 |
GaAs differential line receiver with positive feedback
A gallium arsenide differential line receiver circuit has a first and second receiver means for receiving first and second differential input signal voltages. A pair of depletion transistor means...
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4620314 |
Method of generating an approximately sinusoidal signal and circuit arrangement for implementing this method, particularly in a stereo demodulator
An approximately sinusoidal signal is generated by superimposing a first signal, which has a half cycle duration and corresponds to a triangular signal which is suppressed during every second half...
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4616185 |
Multiplying circuit comprising switched-capacitor circuits
Multiplying circuit for multiplying a first signal x(t) by a periodic second signal y(t) and being particularly suitable for use as an amplitude demodulator in a stereo decoder or in a phase-locked...
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4605902 |
Hybrid junction signal combiner
Isolation is provided to two signal sources whose output signals are combined by the use of an outphasing technique. A first divider divides the signal from a first signal source into two signals...
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4577154 |
Pulse width modulation circuit and integration circuit of analog product using said modulation circuit
A pulse width modulation circuit which can cancel the mean error of pulse width modulation with respect to time due to the offset voltage of a triangular wave signal and to the offset voltage of a...
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4573177 |
Bi-directional current differencer for complementary charge coupled device (CCD) outputs
D.C. reconstruction of sampled CCD output signals is achieved by subtracting the output current pulses of two CCDs (or subtracting parallel outputs of the same CCD) with a differencing circuit...
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4564831 |
Analog to digital converters for converting a plurality of different input signals
An analog to digital converter apparatus arranged to convert a plurality C (=4) of different input signals to digital representations thereof. The apparatus comprises a multiplexer arranged...
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4550263 |
Waveform generator
A waveform generator is provided which is capable of generating simultaneously a plurality of electrical signals which have different waveforms. The waveform generator is completely battery...
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4546275 |
Quarter-square analog four-quadrant multiplier using MOS integrated circuit technology
A four-quadrant NMOS transconductance multiplier including plural NMOS transistors formed in a substrate to produce a pair of summer stages and a pair of squaring stages which process a pair of...
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4523108 |
Averaging circuit
An averaging circuit includes a number of sample/hold circuits which cyclically sample/hold an input signal, the outputs of the sample hold circuits being added and applied to a comparator. A...
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4517520 |
Circuit for converting a staircase waveform into a smoothed analog signal
In converting a staircase waveform signal into a smoothed analog signal, this circuit can perform the high-quality conversion without any sophisticated lowpass filter. An input staircase signal is...
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4499426 |
Baseband discriminator for frequency or transform modulation
A baseband discriminator decodes a pair of trigonometric transform function signals, sin f(t) and cos f(t), to provide an original audio signal f(t) by first deriving the derivative of the audio...
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4498138 |
Electronic watt/var transducer
A watt/var transducer utilizing the pulse width-pulse height modulation type of multiplying scheme wherein a stable squarewave is generated by switching from one reference voltage to another...
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4494073 |
Frequency generator using composite digitally controlled oscillators
A frequency generator for generating a large number of closely and evenly spaced frequencies over a large bandwidth including a first digitally controlled oscillator and a second digitally...
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4491801 |
Matrix circuit for processing plural signals
Unbalanced two input signals are applied to a buffer. The buffer provides to an balanced adder with balanced buffer output signals. The adder adds the buffer output signals and generates an...
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4467442 |
Microwave quarter-square multiplier
The microwave quarter-square multiplier uses square law devices in combinon to obtain vector multiplication at microwave frequencies. A sum and difference hybrid provides sum and difference output...
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4403156 |
Frequency conversion circuit
A frequency conversion circuit in which effects of odd order terms in the input and output characteristics of the active elements of the circuit, which otherwise would produce IM interference, are...
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4399411 |
Quantized video signal level interpolator
A signal which changes from amplitude X to amplitude Z is applied to a resistor of value R which is series connected with an electrical L-C (inductor-capacitor) delay line unterminated at the...
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4388540 |
Controllable multiplier circuit with expanded gain control range
A multiplying circuit comprising a pair of transistors including first and second transistors arranged in a long-tailed pair configuration having a collector output and interconnected emitter...
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4387439 |
Semiconductor analog multiplier
Analog multiplier utilizing the square-law characteristic of MOSFET is disclosed. The product is obtained by taking the difference of squares of the sum and difference of two quantities. The square...
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4383189 |
Circuit arrangement for summing the powers of two isofrequential microwave signals
Two microwave signals of identical frequency, possibly differing in amplitude and/or phase from each other, are combined by feeding them to respective inputs of a directional coupler with outputs...
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