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Document Title |
JPH05191211A |
PURPOSE: To provide a switched capacitor inverting phase integration device in which an integration time within one sampling period is extended. CONSTITUTION: The device is provided with switches 11-17, capacitors 31-34 and an operationa...
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JPH0550169B2 |
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JPH0546911B2 |
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JPH0546912B2 |
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JPH0542179B2 |
An operational amplifier capable of selectively performing a variety of circuit functions is provided. A single operational amplifier utilizes switched capacitors for sampling and holding an input signal, for establishing a low frequency...
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JPH05145038A |
PURPOSE: To precisely realize a capacity element in the values differentiated by a program processing in a semiconductor chip. CONSTITUTION: A programable capacitor is composed of a capacitor C1, one or each of two multipliers M1, M2. Wi...
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JPH0532984B2 |
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JPH05122082A |
PURPOSE: To prevent the output of erroneous digital data even when a switched capacitor filter type analog integrator comes into a saturation state. CONSTITUTION: When an analog input signal is inputted between an input terminal 2 and th...
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JPH0531969B2 |
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JPH05102740A |
PURPOSE: To provide a unit gain buffer circuit for a digital-analog converter(DAC) using a switched capacitor filter. CONSTITUTION: The sources of differential input transistors 190 and 200 are connected to a common node 202. A current s...
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JPH0528006B2 |
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JPH0583042A |
PURPOSE: To obtain a low-distortion output part for a digital-to-analog converter(DAC) which uses a switched capacitor filter for an analog part. CONSTITUTION: The output stage of the DAC is used in combination with the switched capacito...
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JPH0583139A |
PURPOSE: To convert a sample data analog signal by a switched capacitor into a continuance analog signal by a D/A converter substantially without increasing distortion. CONSTITUTION: A digital input is converted into an analog value in a...
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JPH0575395A |
PURPOSE: To reduce the start-up time till the circuit is made stable after power- down is released with respect to the switched capacitor filter comprising an operational amplifier available of power-down operation and a switched capacit...
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JPH0520928B2 |
A symmetric finite impulse response filter for receiving a digital input signal and generates a filtered analog output signal for application to a balanced line, such as a tip and ring lead pair. Logic levels of predetermined symmetrical...
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JPH0516773B2 |
A working on the zero IF principle is disclosed which contains a feedback circuit instead of a preselector for suppressing interfering signals. The interfering signals contained in the incoming signal (FE) are separated from the useful s...
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JPH0548389A |
PURPOSE: To eliminate the need for a compensation circuit reducing an offset voltage by splitting MOS transistor(TR) into plural numbers so as to receive a same current density and connecting the side of the source whose diffusion area i...
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JPH0512884B2 |
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JPH0512891B2 |
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JPH0511450B2 |
In a line equalizer responsive to an input signal of a variable data rate for producing an equalizer output signal, a control circuit (12) supplies an equalizer circuit (11) with a selection signal (SEL) which is determined by the data r...
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JPH057131A |
PURPOSE: To reduce signal depending distortion generated in a switch process by directly and alternately switching first and second switches from one contact point in each switch to the other contact point. CONSTITUTION: In an initial st...
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JPH051509B2 |
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JPH04360412A |
PURPOSE: To realize a resistance network by solving a boundary value problem of a partial differentiation equation at a high speed with high accuracy while varying parameters variously. CONSTITUTION: Resistors R0, R1 network is constitut...
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JPH0475685B2 |
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JPH0474888B2 |
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JPH04331510A |
PURPOSE: To filter PWM signals by using a switched capacitor filter, which does not require any high sampling frequency, and to easily make a circuit into an IC by supplying signals to a switched capacitor after integrating them with a P...
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JPH04326615A |
PURPOSE: To reduce the circuit capacitance ratio wihtout changing the frequency characteristic and to reduce the circuit scale and the manufacture dispersion by forming the filter device with plural input capacitors, feedback capacitors,...
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JPH04312014A |
PURPOSE: To easily adjust a post filter circuit, and to reduce the power consumption of a switched capacitor filter(SCF) at a main body side. CONSTITUTION: When the outputs of a first SCF to change at 336kHz sampling are inputted from an...
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JPH04312015A |
PURPOSE: To reduce the number of pieces of operational amplifiers, and to attain low power consumption by making the switched capacitor filter into configuration in which a sample hold circuit is omitted at an input side. CONSTITUTION: T...
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JPH0445123Y2 |
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JPH04291823A |
PURPOSE: To realize an A/D converter with simple constitution adjusting the switching clock of a switched capacitor filter impartially and uniformly. CONSTITUTION: An analog signal is fed to a band pass switched capacitor filter 101, fro...
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JPH04286416A |
PURPOSE: To attain excellent delay accuracy, to ensure the reliability regardless of the temperature and to attain the high speed small-sized delay circuit by storing valid signal only at sampling to a capacitance in a form of a charge. ...
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JPH04286415A |
PURPOSE: To reduce noise between a well region and a capacitor by forming a capacitor being a component of the switched capacitor filter onto the well region formed in a semiconductor substrate and connecting the well region to a noninve...
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JPH04282912A |
PURPOSE: To provide a tuning circuit which tunes such an integrated circuit filter as the continuous-time MOSFET-C filter, etc. CONSTITUTION: The transistor 16 and capacitor 14 of a filter 12 are matched to the transistor M and capacitor...
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JPH0462203B2 |
1. Modulator circuit realized as a switched capacitor (SC) filter, which is driven by a modulation clock (vphi M , ~v~p~h~i M ), comprising switches, capacitors and at least one operational amplifier (3) whose non-inverting input (5) is ...
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JPH04273712A |
PURPOSE: To prevent phase delay from being increased in a sample servo system and a hazard from occurring in a continuous servo system when this circuit is used as the filter of the servo circuit of an optical disk. CONSTITUTION: When an...
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JPH0457125B2 |
An operational amplifier gain stage utilizing switched capacitor resistor equivalent circuits is designed utilizing a delayed clock reference signal ( phi D, phi D) in a unique manner, thereby eliminating the effects of spurious error vo...
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JPH04250711A |
PURPOSE: To integrate the switched capacitor filter without being affected of increase in a chip area and a stray capacitance or the like. CONSTITUTION: Capacitors Cs forming the switched capacitor are connected in series. In the case of...
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JPH0452652B2 |
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JPH0451086B2 |
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JPH0450634B2 |
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JPH0446485B2 |
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JPH0446007B2 |
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JPH04192615A |
PURPOSE: To set the initial level of each contacts potential of 1st-3rd capacitors and to decide a transfer charge quantity accurately by providing a circuit comprising 1st-3rd resistors, 1st and 2nd operational amplifiers, a switch and ...
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JPH0431409B2 |
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JPH0429247B2 |
PURPOSE:To reduce the number of power supply terminals and to facilitate making a switched capacitor integrator into an integrated circuit, by using the power source of an operational amplifier for the discharge path of a switched capaci...
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JPH0429246B2 |
A low pass filter which comprises first, second and third switched capacitor circuits connected to a power source VDD and/or a power source VSS, first and second operational amplifiers driven by the power sources VDD and VSS, and a bias ...
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JPH0453323U |
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JPH0425726B2 |
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JPH0420283B2 |
A switched capacitor MOS high-pass filter (10) includes a blocking capacitor (C1) which accepts an input signal at one side (IN). A first electronic toggle switch (S1) connects the gate of a depletion-mode buffer transistor (T1) alternat...
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