Matches 51 - 100 out of 305 < 1 2 3 4 5 6 7 >
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5610547 Logarithmic transformation circuitry for use in semiconductor integrated circuit devices  
A gain cell circuit includes a logarithmic transformation circuit. The logarithmic transformation circuit includes a pair of first and second transistors, each of which has first and second current...
5585757 Explicit log domain root-mean-square detector  
An explicit RMS detector sequentially performs the square, mean and square-root operations in the log domain. An input signal is first applied to a log converter, and then to a times two multiplier...
5578958 Logarithmic amplifier  
A logarithmic amplifier for preventing an abnormal output from occurring when receiving an excessive input. The logarithmic amplifier is provided with an operational amplifier for logarithmic...
5572162 Filter with reduced element ratings and method  
An electronic filter for passing predetermined frequencies includes resistive and capacitive components that need not be rated to handle the input voltage. An input signal is converted to a second...
5570055 Demodulating logarithmic amplifier  
A logarithmic amplifier gain stage for supplying, in response to an instantaneous input signal, an output signal corresponding to a logarithmic value of the input signal. The gain stage includes a...
5570052 Detection circuit with differential input and hysteresis proportional to the peak input voltage  
A differential comparator with a hysteresis proportional to the peak value of the input signal. The comparator operates independently of the magnitude of the supply voltage and of the ambient...
5561392 Logarithmic amplifier employing cascaded full-wave rectifiers including emitter-coupled pairs with unbalanced emitter degeneration as logarithmic elements  
A logarithmic amplification circuit is provided which is composed of a differential amplifier, a plurality of full-wave rectifiers including two half-wave rectifiers connected so as to have their...
5534813 Anti-logarithmic converter with temperature compensation  
An anti-logarithmic type converter circuit, with temperature compensation, includes a diode connected between a unity gain, non-inverting interface circuit and a low-impedance reference voltage...
5528191 Logarithmic amplifier having improved speed response  
A logarithmic amplifier includes an operational amplifier, an element for logarithmic conversion purposes connected to a feedback circuit of the operational amplifier, an oscillation prevention...
5526058 Video signal adjusting apparatus, display using the apparatus, and method of adjusting the display  
A color corrector receiving a video signal as an input signal and producing an output signal representing a function of power of the input signal includes a logarithmic converter for achieving a...
5525924 Log conversion circuit  
A log conversion circuit comprising first and second input terminals to which voltage signals are input, first and second resistors, first ends of which are respectively connected to the first and...
5523712 Resistor array circuit device and variable gain device utilizing same  
To provide a resistor array circuit device and variable gain device which make possible precise setting of attenuation factors and the like as well as prevention of generation of gridge noise, a...
5521544 Multiplier circuit having circuit wide dynamic range with reduced supply voltage requirements  
A multiplier circuit including a first voltage supply for supplying a first voltage; a second voltage supply for supplying a second voltage; and a control section having a first terminal through...
5521548 Phase detector  
In a phase detector, an input signal (Si) is multiplied in a multiplier by two reference signals intersecting at right angles with each other. Signals obtained by multiplication are passed through...
5489868 Detector cell for logarithmic amplifiers  
A detector cell for a logarithmic includes a differential pair of inputs across which a input signal V 0 is applied across. The detector cell also includes a pair of differential outputs. The...
5481218 Logarithmic converter  
A logarithmic convertor based on a nonlinear successive detection principle has a temperature-compensated biassing arrangement and a large operating range due to a d.c. feedback network for offset...
5481180 PTAT current source  
A PTAT current source has first and second current mirror circuits, each comprising a cascode transistor, an output transistor in series with the cascode transistor, and a base current compensating...
5475623 Method for the conversion of a measured signal, a converter as well as a measurement setup and a pirani measuring circuit  
A method and apparatus for convening a measured signal which, at least in a first approximation, is related to a quantity of interest by the equation (a): ##EQU1## where y is the quantity of...
5471173 Cascaded amplifier having temperature compensation  
A cascaded amplifier is comprised of a number of amplifying stages connected in cascade such as the dual emitter-coupled amplifier shown. A first pair of transistors (14,20) provides limiting...
5471132 Logarithmic and exponential converter circuits  
A logarithmic amplifier has first and second mirror circuits, each having active transistors interconnected by a resistor. The current input is applied within one of the mirror circuits so that a...
5467093 Logarithmic detector  
A logarithmic detector having a first input line linked to the base of the first transistor, a second line linked to the base of the second transistor, a third input line linked to the bases of...
5455847 Clock recovery phase detector  
A phase detector for symbol clock recovery in a digital communications system determines the phase error of a local symbol clock from the symbol rate of a transmitted signal by sampling the...
5451895 Wideband amplifier with logarithmic output characteristic  
A wideband amplifier which employs a plurality of cascaded logarithmic amplifier stages under the control of a digital signal processor which nulls offset voltages. In one aspect of the invention,...
5408267 Method and apparatus for gamma correction by mapping, transforming and demapping  
Gamma correction is performed by dividing the total gamma transfer function input value range into a plurality of segments. The source RGB data is then mapped into an associated x-position in a...
5365313 Image forming apparatus for controlling image density using logarithm compressing means  
A toner depositing amount measuring apparatus for measuring the amount of toner deposited on a photosensitive drum includes a light source for irradiating the surface of the photosensitive drum...
5363000 Solid-state image sensing apparatus  
In an image sensing device, a photodiode is connected to a drain of a MOS transistor. The drain is connected to a gate of the MOS transistor via a resistor. The MOS transistor operates in a...
5352944 Apparatus and method for producing a temperature-independent current signal in an automatic gain control circuit  
A circuit particularly useful in AGC systems, produces an output current which is proportional to the difference between a signal voltage and a reference voltage which is practically independent of...
5345185 Logarithmic amplifier gain stage  
A logarithmic amplifier gain stage for supplying, in response to an instantaneous input signal, an output signal representing a portion of a corresponding logarithmic value of the input signal. The...
5338985 Low voltage, simplified and temperature compensated logarithmic detector  
An electronic circuit with a logarithmic detector performs the following operations: receiving an input voltage, generating a series of subsequently amplified versions of the input voltage,...
5327029 Logarithmic current measurement circuit with improved accuracy and temperature stability and associated method  
A logarithmic current measurement circuit for operating upon an input electric signal utilizes a quad, dielectrically isolated, well-matched, monolithic bipolar transistor array. One group of...
5304873 Log compressing circuit providing capability of keeping clamp level independent of variety of amplification factor  
A log compressing circuit is arranged so that the clamping level is independent of the amplification factor of a first transistor for amplifying input current. The log compressing circuit includes...
5298811 Synchronous logarithmic amplifier  
A synchronous progressive-compression type logarithmic amplifier includes one or two channels of amplifier/limiter stages and a corresponding multi-stage synchronous demodulator circuit to provide...
5296761 Temperature-compensated logarithmic detector having a wide dynamic range  
An IF amplifier/log detector with a modular architecture includes a plurality of voltage amplifiers, a plurality of rectifiers, a plurality of voltage-to-current converters and a current summing...
5286969 Apparatus for measuring optical power in an optical receiver with a non-linear element and a transconductance amplifier  
An optical power monitoring circuit in an optical data receiver. A transconductance amplifier with non-linear feedback converts averaged photodiode current into a voltage representing a logarithm...
5268601 Logarithmic amplifier circuit with temperature compensation  
An amplification circuit comprises a detector (15) for detecting transmitted radio signals in the range 0.5 GHz to 20 GHz and a wideband logarithmic video amplifier (WLVA 16). The WLVA is...
5252864 Normalization circuit for a measuring device  
A measuring device comprises at least two transducer units for sensing input quantities (A i ) and for producing signals which are proportional to the logarithm of the input quantities. The...
5241282 Wide dynamic range, low power, analog-to-digital receiver  
A low power, wide-dynamic-range, signal compressor is suitable for operat from batteries. The compressor input is compatable with most sensors, resistive, capacitive or inductive and it is capable...
5223799 Parabolic signal generator  
In a parabolic signal generator, a sync pulse is applied to a saw-tooth wave generation circuit, the output of the saw-tooth wave generation circuit is entered to an absolute value circuit, the...
5220219 Electronically controlled variable gain amplifier  
An electronically controlled variable gain amplifier is disclosed which provides an output signal proportional to the value of an input signal multiplied by a gain factor, where the gain factor is...
5159280 True logarithmic amplifier having a variable gain amplifier  
A true logarithmic amplifier including a gain controlled amplifier having an RF signal input and a gain control input and a successive detection logarithmic amplifier having an RF signal input and...
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...
5126846 Non-linear amplifier and non-linear emphasis/deemphasis circuit using the same  
A non-linear amplifier circuit comprises a low band eliminating filter for receiving an input signal from an input terminal, a logarithmic amplifier and an adder for adding the output signal of...
5081378 Logarithmic amplifier  
An input signal voltage applied to a signal input terminal is converted to a current by a differential amplifier, a voltage-to-current conversion resistor and an NPN type bipolar transistor. An...
5014013 Antilog circuit with automatic gain control  
A circuit for converting a log signal to a linear signal wherein automatic gain control is performed before the signal is linearized. The circuit includes a bipolar transistor connected to use its...
5012140 Logarithmic amplifier with gain control  
A logarithmic amplifier includes a first diode wherein the anode receives an input signal input signal current and a standing current. The cathode of the first diode is coupled to the emitter of a...
4983863 Logarithmic amplification circuit for obtaining output voltage corresponding to difference between logarithmically amplified values of two input currents  
A logarithmic amplification circuit is provided with a first transistor 10 having its collector supplied with a first input current, a second transistor 11 having its collector supplied with a...
4980584 Multi-stage wideband successive detection logarithmic amplifier  
A successive detection logarithmic amplifier consists of multiple stages, with each stage containing a field-effect transistor (FET) which functions as both an amplifier and a detector. The FET,...
4972512 Circuit for linearly amplifying and demodulating an AM-modulated signal, and integrated semiconductor element for such circuit  
Circuit arrangement for linearly amplifying and demodulating an AM-modulated signal, and integrated semiconductor element for said circuit arrangement. A linear amplifier and demodulator for...
4972513 Multi-point optical amplification repeating system  
A multi-point optical amplification repeating system is disclosed in which an output of a unidirectional amplifier inserted in a unidirectional repeating optical transmission system is branched and...
4950076 Alternate approach for obtaining dynamic range in monopulse guidance systems  
A system for improving the dynamic range of guidance systems for missiles d bombs by replacing pseudo-logarithmic amplifiers in the processing circuits with transimpedance amplifiers having feed...
Matches 51 - 100 out of 305 < 1 2 3 4 5 6 7 >