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JPS6115620B2 |
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JPS6179317A |
PURPOSE: To obtain a tertiary low-pass type SCF which is less in power con sumption and small in chip size, by replacing resistance elements constituting floating inductance with positive and negative resistances realized by means of swi...
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JPS6173415A |
PURPOSE: To improve the amplitude distortion and phase distortion by increasing the ratio of an input sampling time out of the input sampling time and a holding time in one period of a capacitor circuit using a factor multiplying circuit...
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JPS6112408B2 |
An analog signal processor in which the voltage is sensed across a plurality of charge storage elements to derive an output signal. With this arrangement, the effects of signal interaction encountered in charge sensing are eliminated. Th...
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JPS6166499A |
An earpiece comprises a suction cup sensor, a preamplifier, a potentiometer for varying the gain of the amplifier, a pass band filter and electronic means enabling the user to adjust the central frequency and/or width of the pass band of...
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JPS6165617A |
PURPOSE: To realize a PSRR (power supply fluctuation suppressing ratio) characteristic nearly equal to a positive and a negative power supply by using nearly the same number of operational amplifiers having different differential transis...
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JPS6152018A |
PURPOSE: To improve the operating accuracy by connecting the 1st and 2nd capacitors to a virtual common input terminal of an operational amplifier and using an analog switch so as to switch a common and an input or output terminal of eac...
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JPS6148222A |
PURPOSE: To reduce power consumption and to attain miniaturization by applying connection/disconnection to plural integration capacitors to/from one operational amplifier in response to a clock signal so as to apply integration. CONSTITU...
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JPS6143813A |
PURPOSE: To realize an optional pole with a comparatively less number of components by providing an inverting switched capacitor coupled between an inverting input of the 1st operational amplifier and an output terminal of the 2nd operat...
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JPS6133524U |
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JPS6139615A |
PURPOSE: To enable to obtain stable reference voltage without increasing electric power consumption for variation of load by connecting an operational amlifier having connected inversion input end with an output end to the output end of ...
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JPS6132609A |
PURPOSE: To obtain the switched capacitor amplifier which suits to IC-implementation and obtains an optional amplification degree at a switching frequency by connecting switched capacitor equivalent resistances which are variable in freq...
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JPS6130120A |
PURPOSE: To improve the output duty of a pulse amplitude modulated wave of an A/D converting system and to improve the quality of the system by outputting interpolatively an average value of an analog signal output corresponding to an in...
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JPS6129209A |
PURPOSE: To obtain a filter circuit that can miniaturize a semiconductor chip by making charging and discharging to a capacitor by an MOSFET of P and N channel. CONSTITUTION: The MOSFETQ11 becomes on when a clock signal 1 supplied as a g...
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JPS6126319A |
PURPOSE: To cancel the effect of a parasitic capacitance by connecting an input signal source and a bias power supply and connecting an amplifier input terminal and an output terminal with plural capacitors alternately. CONSTITUTION: A c...
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JPS6124319A |
PURPOSE: To eliminate or extract a synchronizing frequency component in high speed with high accuracy by constituting a control system input detector with a synchronizing frequency generator comprising a PLL and a V/F circuit etc., and a...
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JPS613040Y2 |
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JPS61500144A |
A switched capacitor biquadratic filter (10; 20) includes means for dynamically shifting the level of the input voltage (VB, VD; VX, VY,) of the amplifiers (12, 14), so that the need for a level shifting stage in the amplifiers (12; 14) ...
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JPS611921B2 |
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JPS611792B2 |
PURPOSE:To obtain a switched capacitor type integral network having the reduced occurrnce of the folded noise, by having a complementary action of the switched capacitors of the same constitution. CONSTITUTION:The input signal is applied...
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JPS616922A |
PURPOSE: To decrease number of components and to reduce a DC offset by providing the 1st and 2nd capacitors and the 1st, 2nd and 3rd switches switching and connecting the capacitors between an inverting input terminal and an output termi...
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JPS60254815A |
A first resistor (R1) and a first capacitor (C1) constitute a filter arrangement having a time constant which is not very accurate due to the inaccuracy of the resistor and the capacitor values in intergrated circuits. The time constant ...
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JPS60253312A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
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JPS6056006B2 |
Quadrature transposition stage has two signal channels, each containing a filter. A gyrator circuit is coupled between the filters. The result is that the two filters have exactly the same transfer function which reduces signal distortio...
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JPS60245305A |
PURPOSE: To decrease the number of weighting circuits by connecting in common a delaying circuit corresponding to a tap whose weight coefficient is equal, to the weight circuit. CONSTITUTION: An impulse response of a transversal filter o...
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JPS60229415A |
PURPOSE: To absorb variance of capacitors and resistors subject to circuit integration and secure performance by providing plural sets of at least the resistors or the capacitors subject to circuit integration, providing a switch switchi...
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JPS60223335A |
PURPOSE: To decrease the number of externally mounted components to an IC without any clock signal generating circuit especially by constituting an intermediate frequency transformer of an AM receiver with a switched capacitor filter and...
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JPS60218915A |
PURPOSE: To obtain a sine wave of a fixed P-P level regardless of the frequencies by using a switched capacitor low-pass filter to a variable low-pass filter. CONSTITUTION: A switch capacitor low pass filter SCF6 has a cutoff frequency f...
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JPS60217724A |
PURPOSE: To realize a low power equivalent resistor possible for pre-emphasis and de-emphasis operation by using a switched capacitor filter controlled by a voltage controlled oscillator as a signal transmission circuit. CONSTITUTION: Th...
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JPS60217715A |
PURPOSE: To attain setting of a coefficient by 1% step by using in common a capacitor for setting a coefficient of 1% step and 10% step and using further a capacitor ratio and a switched capacitor type voltage divider together. CONSTITUT...
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JPS60217716A |
PURPOSE: To decrease the number of pins in circuit integration by mounting a switch for settings a coefficient and a resistor for setting 10% step coefficient to the outside of an integrated circuit in a coefficient circuit of a switched...
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JPS60214621A |
PURPOSE: To decrease element sensitivity by providing a switched capacitor HPF circuit in which a quartic LC ladder type HPF is simulated. CONSTITUTION: The sampling frequency and cutoff frequency of the switched capacitor type HPF circu...
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JPS60214086A |
PURPOSE: To form a circuit into an IC capable of an optional processing by obtaining leading-out of the degree of amplification and control of the arithmetic function of the circuit by a ratio of clock frequencies for a switched capacito...
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JPS60212021A |
PURPOSE: To eliminate the effect of an offset voltage with simple constitution by constituting the circuit that a capacitor for differential voltage detection is charged by a voltage value between any input voltage and an offset voltage ...
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JPS60210032A |
PURPOSE: To set the optimum tap weight by providing an automatic gain controller between the output of an automatic equalizer and a deciding device in order to correct the attenuation of the data output. CONSTITUTION: The input signal gi...
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JPS60199214A |
PURPOSE: To realize the voltage dividing ratio of 1/2 with higher accuracy than the accuracy of a voltage dividing ratio of a voltage dividing element by deciding an error of the final voltage dividing ratio depending on the product betw...
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JPS60199213A |
PURPOSE: To realize a voltage dividing ratio of 1/2 with high accuracy by cancelling the error of the ratio of capacitance values at the stage synthesized with each terminal voltage through the parallel connection of both capacitors even...
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JPS60198912A |
PURPOSE: To obtain an excellent characteristic by using plural operational amplifiers in time division so as to simplify the constitution of a recursive filter. CONSTITUTION: The recursive filters are connected by 2-stage in cascade and ...
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JPS60196881A |
PURPOSE: To improve the resolution of coefficient setting by using both a capacitor ratio and a switched capacitor type voltage divider in a switched capacitor type coefficient setting circuit. CONSTITUTION: A coefficient setting part II...
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JPS60197010A |
PURPOSE: To reduce an input voltage by connecting a switched capacitor circuit in parallel, and shifting an charge of the capacitor successively to the next capacitor. CONSTITUTION: S1 is turned on by one level of a clock pulse 1, an inp...
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JPS60160724A |
PURPOSE: To decrease the leakage of a clock by detecting the leakage of a clock applied to a gate in an analog switch comprising series connection of an MOSFET switch and a capacitive MOSFET to control the phase difference of the two clo...
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JPS60158708A |
A single stage high performance operational transconductance amplifier consists of a pair of p-channel load field effect transistors, a pair of n-channel type cascode field effect transistors, a pair of n-channel differential field effec...
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JPS6031368B2 |
An improved bandpass filter circuit for selecting a relatively narrow band portion of an input sinusoidal signal. The improved bandpass filter circuit produces an output signal whose phase deviation from the input signal is substantially...
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JPS60126698A |
An electronic musical instrument is provided with a temporal variation circuit of SCF parameters for temporally varying the filter characteristic of a switched capacitor filter circuit, a control circuit for digitally controlling the tem...
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JPS60105312A |
PURPOSE: To reduce the power consumption by inserting a resistor division circuit whose dividing ratio is changed by a control signal to the input side and the output side respectively to reduce the circuit scale. CONSTITUTION: The resis...
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JPS60103819A |
PURPOSE: To reduce the leading time of an output signal at application of power even with a coupled capacitor to an output terminal by inserting the 1st analog switch to a path receiving a power supply voltage and the 2nd analog switch i...
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JPS6097715A |
PURPOSE: To obtain an amplitude equalizer with less number of components and also less DC offset generated from the circuit by providing an operational amplifier whose non-inverting input terminal is connected to a common potential point...
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JPS6077129U |
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JPS6077130U |
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JPS6085613A |
PURPOSE: To attain the titled preamplifier suitable for large scale circuit integration by constituting an amplifier circuit of a modulation signal with an operational amplifier, an input/output capacitor pair of set the gain of the oper...
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