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5418486 |
Universal digital filter for noisy lines
A noise-suppression logic system suppresses a noise signal having a time duration which is less than a predetermined time. A delay circuit has a delay which is equal to the predetermined time. A...
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5418449 |
Device for the detection of power at the output of an electronic circuit
The disclosure relates to the servo-control of an electronic circuit that calls for the detection of the power delivered at its output. The disclosed device is essentially constituted by a...
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5416326 |
Analog spatial filter for detection of unresolved targets against a cloud-cluttered background
A six-pole band-pass filter system and circuit configured for optimal permance in an associated infrared search and track (IRST) system which outputs data in an analog format is disclosed. The key...
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5416438 |
Active filter circuit suited to integration on IC chip
An active filter circuit has been proposed which is fabricated on a chip and which comprises a two-input operational amplifier with one input for feedback, and a first capacitance element connected...
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5414311 |
Sample and hold circuit and finite impulse response filter constructed therefrom
A high speed sample and hold circuit comprises an amplifier for producing an output current which is a linear function of an input voltage. A capacitor is responsive to the output current for...
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5412335 |
Area-efficient current-input filter, virtual ground circuit used in same, and method therefor
A filter (62) receives an input current signal and provides a filtered output signal in response. The filter (62) presents an extremely low-impedance input node (72) to the source of the input...
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5408135 |
Rectangular-to-sine wave converter
A rectangular-to-sine wave converter circuit (10) is provided that comprises a flip-flop (12) that provides for a square wave and an inverse square wave circuit with fifty percent duty cycles. Each...
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5408422 |
Multiplication circuit capable of directly multiplying digital data with analog data
A new and unique multiplication circuit solves the problems associated with digital multiplication circuits which operate on digital operands only. The multiplication circuit according to the...
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5396188 |
Active filter circuit
An active filter circuit has a filter circuit main part including a first conductance amplifier and a second conductance amplifier in which conductances are each proportional to currents or...
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5396187 |
Amplitude-and rise-time-insensitive timing-shaping filters
An amplitude- and rise-time-insensitive timing-shaping filter (10) for converting a selected input signal into a bi-polar output signal having a zero-crossing point which is independent of the...
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5394036 |
Circuit and method of zero generation in a real-time filter
A real-time tracking filter circuit (10) that exhibits accurate zero placement is implemented in a monolithic structure by incorporating a three-input summing circuit (24) and a two-input summing...
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5389839 |
Integratable DC blocking circuit
An electronic circuit (100) includes an output (110) and a filter circuitry (104, 106 and 108) coupled across this forward transmission path is a feedback loop having an error amplifier (112) and a...
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5384502 |
Phase locked loop circuitry with split loop filter
A filter circuit of a phase locked loop circuitry fabricated on a single substrate provides an error voltage proportional to an amount of a phase difference of a comparison of a reference signal...
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5381107 |
Time-base inversion type linear phase filter of the infinite impulse response type having linear phase characteristics
In a time-base inversion type linear phase filter, an input signal is time-base inverted, and thereafter delayed. The delayed signal is time-base inverted back to the original time sequence and...
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5378947 |
Filter circuit composed of glass delay line with no coil
A filter circuit comprises a glass delay line for giving a predetermined amount of delay to an input signal, and an active filter connected to the glass delay line for performing an impedance...
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5372046 |
Vortex flowmeter electronics
A vortex flow transmitter has a filtering circuit receiving a noise contaminated input signal representative of the flow and which has a fundamental frequency varying responsively to flow. The...
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5371470 |
Transverse filter circuit
A transverse filler for use in a CCD camera eliminates KTC noise even at very fast pixel rates with relatively relaxed constraints on component accuracy and timing control, The circuit includes...
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5355091 |
Apparatus for real time interference signal rejection
Disclosed is a real time interference signal rejection circuit which utils a conventional chirp-Z analyzer to generate a critical number and stop a counter circuit. The critical number is then read...
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5350908 |
Automatic gain control circuit having disturbance cancellation capabilities
A system for filtering electrical signals and cancelling large amplitude disturbance events contaminating such signals which might otherwise interfere with these signals being further processed....
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5350956 |
Deviation limiting transmission circuit
A deviation limiting transmission circuit comprising a soft clipper (13) which performs measurements at two nodes. The soft clipper (13) limits both its own output signal and the output signal of a...
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5343158 |
Amplifier device for a cable television distribution network
The device comprises a first path provided with an amplifier (1) amplifying in a first frequency band, and a second path provided with an amplifier (2) amplifying in a direction opposite to that of...
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5339335 |
Method and apparatus for digitally processing and filtering signals in industrial control applications
A device which is a combination of a method and apparatus and a filter, such as but not limited to, a conventional lag filter for digitally processing and filtering signals used in industrial...
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5332937 |
Transconductor stage for high frequency filters
A transconductor differential stage for high-frequency filters, which has a MOS differential input pair with common sources. The drain of each MOS input is connected to the emitter of an npn...
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5329174 |
Circuit for forcing known voltage on unconnected pads of an integrated circuit
A feedback circuit for input pads of an integrated circuit where one or more of the input pads may not be bonded to a package pin when the pad is packaged or alternatively is bonded but the pin is...
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5327464 |
Dispersal signal removing apparatus
A dispersal signal generating apparatus which removes a dispersal signal effectively and rapidly from an input video signal. A dispersal signal component is first detected from an input reception...
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5327078 |
Position detecting apparstus having a mean value calculating circuit including a low pass filter
A position detecting apparatus for magnetically detecting the position of, for example, a cylinder rod of a construction or industrial machine, a piston of an automotive engine or a scaler of a...
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5317278 |
Switched active fault locate filter
In locating a faulty regenerator, a fault locating filter is used in a T1 or T1C Carrier Repeater Apparatus Case or Office Repeater Bay (ORB) to select the appropriate fault locate sinusoid from...
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5317216 |
Active filter circuit
An active filter circuit includes a first and second differential pairs each having a pair of transistors. A capacitor is connected to a collector of one transistor from each of the first and...
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5317217 |
Universal active filter
A universal filter is provided with three inputs Vh, Vb and V1, with one output Vout, with two transconductance amplifiers Gm1, Gm2, with four capacitors mCO, (1-m)CO, CO and LCO and an amplifier K...
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5313122 |
Capacity ground type filter circuit
In a filter circuit of a capacity ground type in which the capacitance connected to output terminals of integrators is grounded, output signals are fed back from multiple stages of integrators to...
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5311088 |
Transconductance cell with improved linearity
Analog filters may be conveniently implemented in MOS technology by the use of "transconductance cells". Each cell includes stages each having a pair of current paths, with each path comprising a...
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5309771 |
Method for processing signals in vortex flowmeters
An electrical signal generated by a transducer included in a vortex sensor and conditioned by a preamplifier is supplied to a pair of parallel electronic filters respectively inhibiting...
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5311118 |
Ripple elimination in a frequency-to-voltage converter for a cross-coil meter
A frequency-to-voltage converter comprises a pulse generator, an integrator, an inverting amplifier, and a superimposing circuit. The pulse generator generates a pulse signal having a predetermined...
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5311141 |
Active filter circuit
An active filter having a frequency characteristics of the fewer variations of manufacturing and the least temperature dependency is provided. A differential amplifier is comprised of resistors 15...
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5309033 |
Circuit arrangement which compensates for pulse-duration changes in a binary signal
A circuit arrangement compensates for changes of pulse-duration in a binary signal. These changes of pulse-duration are the consequence of parasitic reactances in the signal path of the binary...
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5309112 |
Switched-capacitor circuit power down technique
A method and apparatus for reducing the settling time of a switched-capacitor circuit (10) which includes at least one capacitor (20) having at least one terminal connected to a switch. The method...
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5305388 |
Bass compensation circuit for use in sound reproduction device
A bass compensation circuit for use in a sound reproduction device is provided with a second-order positive feedback type high-pass filter. The filter has an operational amplifier and a first...
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5304940 |
Unwanted signal suppression device
An unwanted signal suppression device is disclosed for suppressing unwanted signals in input signals containing desired and unwanted signals. The input signals are divided into segments in the time...
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5302909 |
Non-linear signal processor
An image is sampled at a given sampling frequency. For each original sample at least one additional sample delayed relative to the first sample is generated (12, 14, 16). The original samples are...
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5298797 |
Gate charge recovery circuit for gate-driven semiconductor devices
A gate charge recovery circuit prevents generation of the voltage spike that would otherwise appear across the sense resistor that is employed to detect the current flowing through the switched...
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5296762 |
Bidirectional microwave amplifier apparatus
A bidirectional amplifier apparatus comprising a plurality of diodes located in a ring structure around an amplifier device to be switched. Each pair of diodes are spaced approximately one quarter...
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5289059 |
Switched capacitor decimator
A switched capacitor decimator circuit (20) is shown to be useful in a cellular telephone that operates in accordance with a subaudible signalling protocol. The switched capacitor decimator circuit...
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5289058 |
MOS operational amplifier circuit
An operational amplifier circuit is composed of a differential amplifier circuit for delivering a signal which is obtained by amplifying a difference between voltage levels of two signals; a level...
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5289060 |
Programmable glitch filter
A glitch filter identifies and eliminates positive edge and negative edge glitches without utilizing a high frequency sampling clock. The glitch filter comprises a programmable delay buffer string,...
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5285165 |
Noise elimination method
The present invention relates to a method for eliminating noise in a signal. The frequency band of the signal is divided into sub-bands, whereafter the useful value of the signal of each sub-band...
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5283483 |
Slimmer circuit technique
A fast parasitic-insensitive continuous-time filter and equalizer integrated circuit that uses an active integrator is described. Circuit techniques for excess-phase cancellation, and for setting...
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5283484 |
Voltage limiter and single-ended to differential converter using same
A voltage limiter (20) includes a resistor (21) receiving an input signal on a first terminal and providing an output signal on a second terminal, and a capacitor (22) connected between the second...
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5276403 |
Nonlinear preemphasis-deemphasis system
A nonlinear preemphasis-deemphasis system of simplified circuit configuration formed of nonlinear preemphasis and deemphasis circuits. The preemphasis circuit comprises a nonlinear signal increase...
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5267310 |
Control circuit for automatic elimination of telephone line noise
A control circuit for automatic elimination of telephone line noise, a reference tone selecting device for selecting the tone signal on the telephone line; a mode switching device for switching...
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5266852 |
Filter circuit for integrated circuit
Transistors Q11 and Q12 constitute a first differential amplifier, their emitters are connected with each other by a resistor R1 and also connected respectively to constant-current sources CS11 and...
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