Matches 101 - 150 out of 169 < 1 2 3 4 >
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4571548 Floating limiter circuit  
A floating limiter circuit for reducing interference from high frequency, very large pulses or fast rise time pulses, without distorting the desired signal. The reference voltage for the limiter...
4539617 AC Power line transient suppressing circuit  
An AC power line transient suppression circuit comprises a bi-directional series breakdown element in combination with a series inductor and a shunt capacitor.
4491903 Combination low-pass filter and high frequency transient suppressor  
Spikes occurring on an AC line and coupled through an AC to DC converter are substantially decoupled from a DC load of the converter even though the converter includes a supply transformer and a...
4471237 Output protection circuit for preventing a reverse current  
In an integrated circuit in which an output transistor connected between an output terminal and a point of reference potential normally conducts current in one direction between the output terminal...
4430618 Input buffer circuit  
In an input buffer circuit arrangement, a comparator compares a filtered input signal applied to one input with each of a first and a second reference value preset at the other input by a first...
4430641 Charge-pump glitch filter  
A circuit including a conventional digital-to-analog converter (DAC) and a charge pump for producing an analog representation of an input waveform defined by an input digital bit stream, the analog...
4390844 Integration filter for step waveforms  
A method and apparatus for converting an input step waveform signal into a smooth output waveform signal is comprised of two sample-and-hold circuits (11, 12), one for sampling each step of the...
4385244 Extraneous signal separating device  
A device for removing extraneous signal components from signals containing a series of pulse components appearing on a signal transmission line at regular intervals and having a predetermined...
4383229 Resonant filter clipper circuit  
A circuit for peak limiting an audio signal comprises a first "M" derived filter, a first clipping circuit, a second-order low pass filter, a second clipping circuit and a second "M" derived...
4375599 Method and circuit for the conversion of variable physical quantities occurring in vehicles represented as frequencies into numerical values or signals proportional to the frequencies  
Converters are known where input pulses are coupled to a detector stage via an adding device and a first integrating register. The detector stage provides an output signal relative to threshold...
4339727 Waveform converting circuit  
Waveform converting circuits are disclosed which eliminate errors in data reproduction due to the transitional response of low or high pass filters even if the data signal contains a D.C....
4322641 Noise reduction system  
A process and apparatus (a) for reducing the perceived noise without perceptible loss of fidelity upon aural reproduction, of an audio input signal in electrical form by means of an electronic...
4268785 Transient overshoot, undershoot and delay compensation circuit in systems comprising reactive filter networks  
A compensation circuit for overshoot, undershoot and delay occurring in response to sudden D. C. level changes in signals received by reactive filters. A D. C. level change, represented by an input...
4256975 Limiter circuit for removing nose from demodulated signals  
A diode limiter circuit comprising a low-pass filter for suppressing noise pulses superposed on a demodulated signal and for passing only the noise-suppressed demodulated signal, and a circuit...
4255724 Distortion-corrector for microwave tubes  
A distortion-corrector which comprises a filter of the low-pass type, of the π or T configuration, and two diodes, in parallel opposition, disposed between the input and output of the filter. This...
4219745 Backlash filter apparatus  
A backlash filter apparatus for the removal of spurious electrical components of a pre-established amplitude level from a voltage signal. The filter apparatus provide a backlash window to which the...
4204170 Impulse noise limiter circuit  
An impulse noise limiter circuit comprises a delay circuit for delaying a signal containing impulse noise and a clamp circuit provided between the input and output terminals of the delay circuit...
4198602 Limiter circuit for limiting pulsive noises  
A limiter circuit comprises a low-pass filter which passes only a modulation signal out of the modulation signal having pulsive noises superimposed thereon and circuit means for supplying the...
4165492 Recirculation circuit for repetition of an analog pulse signal  
A recirculation circuit for repetition of an analog pulse signal provided with a return loop from an output divider and with an input adder for reinjecting the signal into a delay circuit connected...
4163948 Filter for digital-to-analog converter  
A circuit for attenuating undesired electrical aberrations associated with digital-to-analog converters is provided. Specifically, the circuit is a non-linear filter for attenuating undesired false...
4152733 Playback apparatus  
A playback apparatus for a recorded frequency modulated television signal includes a filter between the record carrier pick-up heads and the limiter-demodulator. The filter characteristics increase...
4134074 Dynamic transient response filter  
A filtering system for use in an FM modulating system. The filtering system provides frequency limiting of an input signal and does not overshoot amplitude limitations thereof. This filtering...
4121163 Low-noise microwave signal generator  
A microwave signal generator having improved noise spectral characteristics employs a plurality of amplifier-frequency multiplier circuits in combination with a very stable VHF oscillator. Instead...
4110692 Audio signal processor  
An audio processor for use in an angular modulation transmitter for performing pre-emphasizing, limiting, and low pass filtering functions. Novel pre-emphasis, limiter and low pass filter stages...
4103243 Method and system for controlling peak signal levels in a bandlimited recording or transmission system employing high-frequency pre-emphasis  
In a bandlimited recording or transmission system utilizing broadband limiting and high-frequency pre-emphasis followed by clipping, a unique combination of a lowpass filter and shelving filter are...
4075571 Externally biased video detector circuit for limiting clutter and noise in a detected radar signal  
A video detector circuit for a radar system, including a detector diode having one of its electrodes connected to an input terminal for detecting an applied signal containing target information,...
4064537 Amplitude limiting circuit for frequency modulated video signals  
An amplitude limiting circuit comprises a high-pass filter for passing the high frequency components of a frequency modulated video signal. The centerline of a signal portion has an amplitude width...
4031483 Limiter circuit for servosystems  
A limiter circuit is installed in a servomechanism that establishes a signal at the output terminal of a filter contained therein, in the absence of an input signal within the lock range of the...
4017749 Transistor circuit including source voltage ripple removal  
In a transistor circuit comprising a monolithic semiconductor integrated circuit including at least one first conductivity type transistor having a base connected to a signal input terminal, a...
3968383 Noise limiter  
In a radio receiver, noise limiter apparatus specifically designed to clip impulse noise and to pass the audio signal undistorted up to about 80% carrier modulation. The noise limiter comprises a...
3944853 Video recorder pre-emphasis, de-emphasis circuits  
Improved circuits for pre-emphasis and de-emphasis of video luminance signals, the improvement comprising the utilization of field effect transistors in a non-linear frequency-discriminating...
3898573 Voltage controlled non-linear filter  
A voltage controlled non-linear filter for high and low frequency signals comprises means for separating and dissipating the high frequency out-of-band energy and passing the low freqeuncy in-band...
3833855 COHERENT FILTER  
A high Q bandpass filter employing coherent techniques to synthesize the fundamental component of an input signal under control of a driving signal with frequency like that of the input signal....
3815032 SELF NORMALIZING SPECTRUM ANALYZER AND SIGNAL DETECTOR  
An analyzing system for detecting signals mixed with ambient noise. The desired signal with noise is fed to a bank of contiguously tuned filters which is followed by a bank of envelope detectors...
3798559 NOISE REDUCTION SYSTEM  
A noise reduction system which has a switching circuit, a charge-and-discharge circuit and a variable gain amplifier. When the input signal is lower than a predetermined threshold level, the...
3760196 NOISE SUPPRESSION CIRCUIT  
A noise suppression circuit comprising a transistor, a resistor, a first and a second diode, a first and a second constant current circuit and a capacitor in which the resistor and the first diode...
3755750 NOISE SUPPRESSION FILTER  
A simple and inexpensive device for filtering undesirable high frequency se from analog data outputs of a data processing system, which operates in two different modes and switches automatically...
3723770 CURRENT MODE MATCHED FILTER FOR DIGITAL DATA  
A matched filter for use in a bit-by-bit digital detection circuit is shown including a pair of inductors through one of which current including signal and noise flows during a particular bit...
3694776 ADAPTIVE FILTER WHEREIN OPPOSITE CONDUCTIVITY TRANSISTORS ARE OPERATIVE IN RESPONSE TO SIGNALS IN EXCESS OF PREDETERMINED AMPLITUDE  
An adaptive filter circuit for filtering and attenuating signals coupled thereto which includes first and second opposite conductivity transistors having base electrodes coupled together and...
3654488 CIRCUIT ARRANGEMENT FOR LIMITING AMPLITUDE MODULATION IN A FREQUENCY MODULATED SIGNAL  
A first transistor stage has a tuned output circuit. A coil coupled to the tuned output circuit has, in parallel with it, a series circuit of a resistance and a pair of diodes connected in parallel...
3624558 DELTA MODULATION ENCODER HAVING DOUBLE INTEGRATION  
A delta modulation encoder has a second integrator for producing more rapid alternations in the noise signal, thereby removing a portion of the noise from the signal frequency band. The integrator...
3569844 SYNC STRIPPER  
A video amplifier supplies an input composite video signal to the intensity control electrode of a cathode ray tube and through a low-pass filter to a differential amplifier. The sync tips of the...
3558927 APPARATUS FOR CONTROLLING THE EFFECTS OF BACKLASH  
This disclosure describes an apparatus for controlling the rate at which the backlash of a mechanism is taken up. A demand signal causing rapid acceleration or rapid deceleration is modified prior...
3550041 RF SIGNAL CONTROLLER  
3546494 DYNAMIC FILTER  
3524081 S-FILTER  
3449686 VARIABLE GAIN AMPLIFIER  
3351863 Adjustable damping network  
3333108 Electronic keyer including noise and bias control means  
3303425 Binary detection system  
Matches 101 - 150 out of 169 < 1 2 3 4 >