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JPS5656054A |
An analog-to-digital converter for converting analog signals received in parallel on a plurality of incoming lines into digital signals comprises a selector unit having a plurality of signal inputs. Each input is connected to an incoming...
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JPS5620492B2 |
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JPS5651115A |
PURPOSE: To generate a damped oscillation wave with a simple circuit without power amplifiers by charging and discharging of an LC series resonance circuit. CONSTITUTION: When switch 5 is turned off, capacitor 3 is charged. Next, when sw...
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JPS5637724A |
PURPOSE: To extract selectively the intermediate-level component in the input signal, by using two units of the MOS inverter having the different β ratios and then giving a common connection to the input ends of these inverters to secur...
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JPS5632819A |
PURPOSE: To obtain a filter that uses a small number of operational amplifiers by using the operational amplifiers in time-division mode. CONSTITUTION: With clock 1 on, capacity element C5 is connected to operational amplifier A4 through...
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JPS5614005B2 |
Digital signal processing arrangement such as a digital filter for computing output signal samples which are each equal to the sum of products of a given plurality of pairs (for example N) of input signal samples. One of the input signal...
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JPS5631212A |
PURPOSE: To obtain an attenuation ratio in the speed matched to the sampling period, by controlling the discharge operation frequency dependent upon a discharging circuit according to the attenuation ratio designation signal. CONSTITUTIO...
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JPS5625820A |
PURPOSE: To increase the dynamic range, by providing the capacitor with the integrator every plurality of input terminals and each input terminal. CONSTITUTION: When the level characteristics to each integrator are changed from the input...
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JPS567513A |
The present invention relates to an assembly for filtering by switching, comprising at least one filter with switched paths and means for applying to each of the filters signals for controlling switching of the paths, said assembly furth...
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JPS56977B1 |
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JPS56974B1 |
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JPS55162616A |
PURPOSE: To make easy the delay for a long time, without deformation of signal waveform, by increasing the circuit branched, through the operations such as branch, hold, synthesis and integration. CONSTITUTION: The input signal via an im...
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JPS55137715A |
PURPOSE: To reduce an overall capacity by substituting a part of capacitors by impedance converters and capacitors in switched capacitor filter SCF. CONSTITUTION: In the SCF consisting of operational amplifier A, capacitors C2 and C3, an...
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JPS55130214A |
PURPOSE: To solve the problems of the life time due to existence of the sliding part as well as occurrence of the sliding noise, by using the contactless air capacitor for the capacitance variable element. CONSTITUTION: The charge of CV1...
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JPS55123226A |
PURPOSE: To obtain a variable-constant filter block suitable to IC-implementation with good mass-producibility by providing a control part which changes filter characteristics by setting the switching period of each switching element. CO...
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JPS55120213A |
PURPOSE: To miniaturize a switched capacitor filter and reduce the price by incorporating a control circuit with a memory function in a semiconductor substrate forming a basic filter block. CONSTITUTION: On a semiconductor substrate, a g...
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JPS55117323A |
PURPOSE: To realize the high-speed sending for several tone signals by accelerating the fall of the digital filter output with the clear pulse applied to the switching transistor. CONSTITUTION: High-gain amplifier 9 is connected between ...
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JPS55117324A |
There ist provided a high pass switched capacitor filter having low bandpass ripple. The present filter does not have peaking near its center frequency when sampled at switching frequencies used in communication systems. The high pass fi...
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JPS5534464B2 |
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JPS55115713A |
PURPOSE: To enable broad countermeasure with a single type of filter and to enable to decrease the cost, by making possible the constant externally. CONSTITUTION: For example, layer scale circuit integration is made for mass- prodution b...
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JPS55104114A |
The invention relates to filters using a charge-transfer device as an active element it consists in providing such a filter with an output circuit of first order interpolator type; this circuit may be external to the charge-transfer devi...
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JPS55104115A |
In a switching follower filter of the narrow-band-pass type having n switched paths for filtering a signal having a useful component of variable frequency associated with a high background noise, the fundamental frequency of the input si...
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JPS5588415A |
PURPOSE: To realize the double secondary transmission properties through the proper feeding forward and back. CONSTITUTION: Each capacitor, operational amplifier and the switch featuring the cyclic and synchronous switching function as t...
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JPS5583322A |
An electronic filter circuit is described having first and second selective circuits each of said selective circuits having an input terminal for receiving an input voltage, each of said selection circuits comprising a first capacitor, a...
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JPS5582464A |
The process more particularly comprises introducing beneath the final storage capacitor C6 a quantity of charges equal to that located there during the processing of the preceding sample of the input signal, prior to the beginning of cha...
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JPS5523015B2 |
A method of and apparatus for carrying out remote-control operations, wherein a remote-control frequency is formed from a first auxiliary frequency, the remote-control frequency bearing a predetermined first relationship to the first aux...
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JPS5560325A |
PURPOSE: To realize general IC-implementation by previously forming capacity constituting a switched capacitor as capacity groups with various capacity values and then by selecting fixed capacity from the above-mentioned capacity groups ...
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JPS5538797A |
A switched capacitor sampled data elliptic filter for data transmission or communication systems is disclosed. The filter section comprises three integrating operational amplifiers connected in series with a negative feedback connection ...
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JPS5535598A |
The invention relates to an integrated filter circuit including a charge transfer device (CTD) transversal filter to which a sample-and-hold stage is post-connected. In such filters, a smoothing of the step-shaped signal output voltage e...
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JPS5534600A |
This invention relates to an integrated filter circuit with a charge transfer device transversal filter and a further low-pass filter pre-connected to the transversal filter. The pre-connected filter includes a first capacitor and a seco...
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JPS5528658A |
PURPOSE: To reduce the capacitance of the coupling capacitor and to make easy circuit integration, by holding the output potential of the coupling capacitor to a value dependent on the bias power supply through periodical switching of el...
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JPS5521697A |
In a filter in which, in order to obtain the desired filter characteristic, a weighted sum of different signals is formed, it is proposed in accordance with the invention that for the formation of said sum means are employed which are co...
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JPS5514748A |
PURPOSE: To improve the filter characteristics with deletion of the high frequency component by installing the pre-filter formed by integration of the MOS transistor and the capacitor plus the transversal filterformed by CTD and connecte...
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JPS5514766A |
PURPOSE: To eliminate the limitation for the number of switches by giving control to the switches connected in series to the resistance and capacitor of the variable balanced circuit used for the hybrid via the frequency higher than the ...
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JPS556700A |
A resonator circuit formed in MOS technology for scanned analog signals, wherein such circuits are constructed for use with accumulators and information processing is accomplished by means of switched capacitors which are charged or resp...
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JPS553291A |
An integrator circuit of the type having an operational amplifier with an integrating capacitor (C1) in a feedback loop from its output to its input and having a switched capacitor (K0C1) as equivalent of a resistor connection between a ...
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JPS54134952A |
The invention relates to telephone band low-pass filters for use in demodulating PCM. Such filters are formed by two sections (1, 2) connected in cascade, each section including an operational amplifier (A1, A2). A first section is of th...
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JPS54126445A |
PURPOSE: To make the center frequency of a filter variable stably by constituting this filter by using a N path filter where the center frequency is determined only by a clock frequency. CONSTITUTION: Signals supplied to input terminal 1...
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JPS5422741B1 |
An N path filter where signals are applied to two orthogonal input paths and where the modulated and filtered signals from the input paths are combined and applied to each of the N equiphase output paths, the signals on each output path ...
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JPS5414907B2 |
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JPS53134701A |
A multi-channel analog system comprises a plurality of channels each being adapted to receive analog signals from a signal source such as a seismic sensor. A multiplexer multiplexes the analog channels prior to converting the channels' s...
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JPS53128955A |
PURPOSE: To obtain good filter characteristics by securing a proportion between the resistance value and the closing time of the switch by connecting the resistance in parallel to the switch.
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JPS53114645A |
A device for providing a selectively variable proportion of an electrical signal, which can be used instead of a conventional resistive track potentiometer, is disclosed. The device comprises two switching devices, typically CMOS transmi...
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JPS5379520A |
PURPOSE: To unify the timbres of musical sounds and change them evenly with time by passing a sound source signal through a switching type digital RC and changing the switching time of the filter minutely with time.
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JPS5379521A |
PURPOSE: To unify timbres and their time-change characteristics over the entire pitch by changing the respective output signal levels of a sound source signal generating circuit composed of a switching type digital RC filter with time by...
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JPS5316263B1 |
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JPS5347253A |
PURPOSE: To obtain a low band-pass filter, which can obtain easily the necessary pass band properties as well as vary the properties through variation of the pulse duration and the cycle for a sampling pulse.
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JPS52129262A |
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JPS52129261A |
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JPS5240660Y1 |
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