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3694760 |
FEEDBACK SWITCHING CIRCUIT FOR ELIMINATING ERROR SIGNALS
Apparatus for eliminating error currents normally prevalent when an assoced operational amplifier is disconnected from its input source. A feedback arrangement comprising a field effect transistor...
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3691470 |
CHOPPER AMPLIFIER
A chopper amplifier is disclosed which is particularly applicable for use in conjunction with amplifying low level signals to higher level signals suitable for use with electrical measuring...
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3681703 |
LOW LEVEL DC AMPLIFIER WITH AUTOMATIC ZERO OFFSET ADJUSTMENT
A low level dc amplifier which amplifies low level signals and automatically adjusts the output signal thereof to eliminate the output offset voltage.
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3678402 |
STABILIZED DIRECT COUPLED AMPLIFIER HAVING IMPROVED FREQUENCY RESPONSE AND MINIMUM INTERMODULATION DISTORTION
Improved frequency response, lower distortion factors and rapid overload recovery are obtained in a stabilized operational amplifier by eliminating the blocking capacitor at the input to the...
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3673515 |
EMITTER ELECTRODE CURRENT CONTROLLED AMPLITUDE MODULATOR
A circuit arrangement for amplitude modulation comprises a controllable component such as a transistor driven by the signal to be modulated and whose emitting electrode is connected to a current...
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3671781 |
WAVEFORM RESTORER CIRCUIT
Apparatus is disclosed including a waveform restoring circuit for extracting portions of a fundamental waveform from a composite waveform and combining those portions to reproduce the fundamental...
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3671767 |
HALL EFFECT SWITCHING DEVICE
There is disclosed a Hall effect switching device involving the combination of a Hall effect device, a differential amplifier and a current control trigger circuit. The use of the differential...
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3668538 |
FAST SLEWING OPERATIONAL AMPLIFIER
A fast slewing operational amplifier having as an output stage an inverting integrator and as an input stage a differential amplifier. The output current of the differential amplifier varies in...
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3651419 |
PEAK DEMODULATOR
A switch is connected between the output terminal of an amplifier receptive of an amplitude modulated carrier, and a charge storage means. The switch is closed only during each peak of given...
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3649924 |
SAMPLING AMPLIFIER
An output signal from a sampling system employing an operational amplifier is independent of the offset voltage of the amplifier. A voltage as at the input terminal of a first switch and a ground...
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3646364 |
CIRCUIT FOR REDUCING SWITCHING TRANSIENTS IN FET OPERATED GATES
An FET analog gate includes two equal-valued resistors, one in the source path and one in the drain path of the FET, and a differential amplifier, one input connected to the FET source terminal and...
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3638129 |
CHOPPER STABILIZED AMPLIFIER
Successive levels of a chopped direct voltage input signal are applied to an amplifier during succeeding time intervals. During each such interval a portion of the output signal produced by the...
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3636462 |
AUTOMATIC DC LEVEL CONTROLLING SYSTEM FOR A DC-COUPLED AMPLIFIER
A system has been provided which automatically compensates for DC level drift of the interference signal DC-coupled amplifier in a laser interferometer system. An analog feedback signal provides...
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3634868 |
NEW AND IMPROVED METHOD AND APPARATUS FOR AUTOMATIC BASELINE AND STANDARD CALIBRATION OF AUTOMATIC, MULTICHANNEL SEQUENTIALLY OPERABLE FLUID SAMPLE SUPPLY, TREATMENT AND ANALYSIS MEANS
New and improved method and apparatus for automatic, periodic baseline and standard calibration of analysis results recording means which record the results of sample analyses performed by...
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3624532 |
REENTRANT SIGNAL FEEDBACK AMPLIFIER
This application describes a feedback amplifier which utilizes the input signal at least twice. In the first instance, the input signal is applied to the main amplifier and experiences the full...
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3619798 |
THREE-PORT ELECTRICAL NETWORK
A three-port electrical network that has a first port whose impedance is high and whose voltage controls the potential of a second port which has low or zero impedance and through which an...
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3617913 |
CHOPPER STABILIZED DC AMPLIFIER
A chopper stabilized DC amplifier including a capacitive memory unit and a pair of alternately connected feedback loops. When the first loop is connected, one side of the capacitor is charged to a...
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3603891 |
AMPLIFYING DEVICE WITH WIDE TRANSMISSION BAND AND SLIGHT DRIFT ENABLING A CONTINUOUS COMPONENT TO BE TRANSMITTED
An amplifying arrangement having a wide transmission band and slight drift which enables a continuous high frequency signal component to be transmitted uses two amplifiers, a first one with a wide...
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3597696 |
STABLE HIGH-GAIN SOLID STATE DC AMPLIFIER
A stable high-gain solid-state DC amplifier circuit comprising a low-pass filter connecting a DC supply to an input chopper (either shunt or series connected) that is AC coupled to a high-gain...
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3582675 |
ELECTRONIC SWITCHING ARRANGEMENT
Electronic gating or switching arrangement. A first transistor is connected between the output of an amplifier and an output lead; when on, the transistor provides a direct connection between the...
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3581224 |
BIPOLAR OPERATIONAL POWER SUPPLY
A bipolar operational power supply is constructed to provide stable operation over a wide range of gain settings including zero and with various load conditions in order to provide power output...
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3573644 |
DC STABILIZED WIDE BAND AMPLIFIER
A wideband stabilized wide band amplifier is constructed to have two signal paths, one designed for optimum high-frequency performance and the other designed for optimum low frequency and DC...
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3568085 |
FREQUENCY SHORT INTERVAL SAMPLE AND LONG PERIOD FREQUENCY HOLD CIRCUIT
A frequency determined voltage short interval sample and long period frequency hold circuit with a dual feedback amplifier circuit alternatively switchable between a first feedback path with...
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3555296 |
INDUSTRIAL PROCESS INSTRUMENT FOR PRODUCING LINEARLY-VARYING CONTROL SIGNALS
An electronic signal-controlling apparatus adapted to produce output signals of a predetermined time-varying nature, for example linearly-varying output signals, sometimes referred to in the art as...
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3541320 |
DRIFT COMPENSATION FOR INTEGRATING AMPLIFIERS
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3541462 |
APPARATUS FOR MEASURING LOW VOLTAGES AND CURRENTS WITH AMPLIFIER PROTECTIVE MEANS
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3539935 |
OPERATIONAL UNIT
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3537024 |
ADAPTIVE FILTER
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3535646 |
LOW PASS FILTER CIRCUIT
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3533002 |
OPERATIONAL AMPLIFIER PROVIDING LOW INPUT CURRENT AND ENHANCED HIGH FREQUENCY GAIN
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3530390 |
OPERATIONAL AMPLIFIER WITH VARACTOR BRIDGE INPUT CIRCUIT
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3530389 |
ELECTRONIC PROCESS CONTROLLER HAVING A TWO PART ERROR AMPLIFIER
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3529251 |
HIGH SPEED SWITCHING CIRCUIT
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3525859 |
AUTOMATIC OPERATE-RESET CONTROL FOR ANALOG COMPUTER ELEMENTS
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3525034 |
ELECTRONIC SYNCHRONOUS RECTIFIER CIRCUIT
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3525052 |
DISTORTION CANCELLING CIRCUIT FOR AMPLIFIERS
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3522519 |
ELECTRONIC CHOPPER UTILIZING A FIELD EFFECT TRANSISTOR SWITCH
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3518563 |
ELECTRONIC SYNCHRONIZATION APPARATUS
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3518453 |
SOLID STATE CHOPPER
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3517223 |
TRANSISTOR PHASE SHIFT CIRCUIT
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3516002 |
GAIN AND DRIFT COMPENSATED AMPLIFIER
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3516005 |
AMPLIFIER FOR ENHANCING DIFFERENTIAL INPUT SIGNALS
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3513404 |
MODE-SWITCHABLE AMPLIFIER STABILIZED AGAINST DRIFT
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3510684 |
SOLID STATE DIFFERENTIAL INPUT CHOPPER
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3509460 |
HIGH IMPEDANCE,SELF-ZEROING,DC VOLTMETER CIRCUIT
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3504521 |
METHOD AND DEVICE FOR THE CONTINUOUS ANALYSIS OF THE COMPOSITION OF A GAS
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3501707 |
ELECTRONIC CONTROL APPARATUS HAVING IMPROVED MEANS FOR TRANSFER BETWEEN AUTOMATIC AND MANUAL OPERATION
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3497830 |
GATED OPERATIONAL AMPLIFIER
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3493873 |
RATE RESOLVER CIRCUITRY WITH VOLTAGE LIMITING
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3482113 |
VARIABLE TRANSFER FUNCTION CIRCUIT
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