| Document |
Document Title |
|
JPS5992614A |
PURPOSE: To obtain a small-sized tertiary low-pass filter with low power consumption by using switching capacitor circuits as resistance elements of an impedance converting circuit (FDIC circuit) having frequency dependency. CONSTITUTION...
|
|
JPS5992615A |
PURPOSE: To obtain a quintic low-pass filter which is reduced in power consumption and size by using switched capacitor circuits as resistance elements of an impedance converting circuit having frequency dependency. CONSTITUTION: Resista...
|
|
JPS5985575A |
PURPOSE: To decrease the capacity ratio of a capacity integrator by reducing gradually the voltage transferred to an integrated capacity connected between a negative input terminal and an output terminal of an operational amplifier with ...
|
|
JPS5972215A |
PURPOSE: To vary a capacity ratio accurately with good operativity by connecting plural conductors in the same shape together by a beltlike metallic layer. CONSTITUTION: The 1st conductor 11 made of polycrystalline silicon, etc., is prov...
|
|
JPS5970027A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
|
|
JPS5958909A |
PURPOSE: To obtain a tapped delay line in cascade-connecting switched capacitor circuits advantageous to LSI, by performing the switching control of switches in matching to each function so as to ensure the operation of each capacitor. C...
|
|
JPS5923616A |
PURPOSE: To reduce the leakage of a switching signal to an output side, by adding switching transistors (TR), capacitors, and buffer amplifiers to a time constant circuit which has the quivalent resistance of a switched capacitor circuit...
|
|
JPS594314A |
PURPOSE: To reduce the effect of power supply noise on a switch, by constituting a switch provided at a terminal at the input side of an operational amplifier of an input-stage capacitor with a P channel transistor(TR). CONSTITUTION: The...
|
|
JPS591006B2 |
1496300 Active filters, pulse amplitude modulation WESTERN ELECTRIC CO Inc 8 June 1976 [18 June 1975] 23738/76 Headings H3U and H4L In a signal processing system, an analogue input signal is sampled at a rate nf, and n successive samples...
|
|
JPS5858846B2 |
In sample type signal processing and transmission systems, the periodic sample and hold of an input signal results in sampled signal distortion. A signal shaping circuit utilizes charge redistribution between first and second capacitors ...
|
|
JPS58219812A |
PURPOSE: To improve the operation speed of a switched capacitor circuit to be used for an integrator, a filter, etc. by making said circuit execute one integrating operation every plural samples. CONSTITUTION: Input voltage VIN is inputt...
|
|
JPS58176424U |
|
|
JPS58198918A |
PURPOSE: To reduce beats and error noises generated in sampling by cascading an LPF to a switched capacitor filter. CONSTITUTION: The LPF2 is provided on the input side of a switched capacitor filter 4 in order to reduce beads between th...
|
|
JPS58194418A |
PURPOSE: To process signals with high accuracy, by setting a clock duty so as to obtain an equal signal processing error between a discharge section and a charge section of a capacitor. CONSTITUTION: Capacitors C1 and C3 flow currents an...
|
|
JPS58177028A |
PURPOSE: To eliminate the effect of capacitance added parasitically and to switch accurately the circuit characteristic of an IC circuit, by grounding the other end of a capacitive element constituting the circuit, one end of which is gr...
|
|
JPS58151715A |
PURPOSE: To obtain a switched filter having a reduced number of capacitors, by securing a filter function by shifting the stored charge of the switched capacitor having each unit filter connected to the input terminal of an operational a...
|
|
JPS58143623A |
PURPOSE: To eliminate the mutual interference among capacity coefficient elements contained in each circuit network, by providing a means to separate all circuit networks from each other only for a fixed time when the circuit network is ...
|
|
JPS58137321A |
PURPOSE: To obtain a novel and simple integrating circuit which is used conveniently for Hadamard transformation, by sampling an input signal and integrating sampled values after or without inversion according to a control signal. CONSTI...
|
|
JPS5836849B2 |
|
|
JPS58125909A |
PURPOSE: To reduce the chip size for integration and to decrease the power consumption, by diviidng the voltage of an input signal by a voltage dividing means, sampling the output of division, charging the sampling output to a switched c...
|
|
JPS58124317A |
A sampled first order high pass filter having a configuration that eliminates the output offset voltage normally associated with known filters of this general type. It is constructed according to the diagram of the accompanying figure wi...
|
|
JPS58123220A |
PURPOSE: To reduce the scale of a circuit by providing a modulator and a demodulator to the input and output of a switched capacitor filter instead of providing a modulator and demodulator to every operational amplifier. CONSTITUTION: A ...
|
|
JPS58111521A |
PURPOSE: To attain a resistance circuit network of small capacity and high accuracy, by connecting switched capacitors in series and taking each switch 4- operation in opposite phase alternately. CONSTITUTION: An input signal from an inp...
|
|
JPS58107712A |
PURPOSE: To attain ease of circuit integration, by reducing the kinds of elements constituting a filter by using a switched capacitor. CONSTITUTION: An input signal Vin is branched into a plurality of taps (I)∼ (VII), and each tap is p...
|
|
JPS58105613A |
PURPOSE: To obtain a filter for general use by controlling the connection between two low pass and high pass switched capacitor filters both of which controls cut-off frequency in accordance with clock frequency. CONSTITUTION: Frequency ...
|
|
JPS58104516A |
PURPOSE: To form a multistage delay line and a tapped multistage delay line, by connecting an arbitrary number of delay lines consisting of a switched capacitor (SC) circuit and an integration circuit in cascade. CONSTITUTION: An SC circ...
|
|
JPS5896414A |
PURPOSE: To reduce the total capacitance and the fitting area, by connecting a plurality of varactor diode arrays having a plurality of switches and capacitors in series and determining the capacitance according to the sensitivity of ele...
|
|
JPS5895416A |
PURPOSE: To adjust automatically the center frequency of a filter to an optional frequency, by controlling the switching duty ratio of a switching element, which is connected in series to a resistance provided in the filter, to vary the ...
|
|
JPS5883424A |
PURPOSE: To make the operation stable, by decreasing the power consumption and the dead band, through the constitution of a voltage division circuit with a capacity division circuit, in a filter circuit consisting of a constant current s...
|
|
JPS5872271A |
The symmetrical integrator comprises an operational amplifier having two floating inputs and two floating outputs each having a feedback connection to an input via a capacitor. An input capacitor is connected via two MOS transistors to t...
|
|
JPS5871711A |
A circuit having an inductive characteristic for the realization of filters in integrated circuits is constructed solely from switched capacitors and an operational amplifier. The circuit is provided between a first and a second terminal...
|
|
JPS5870615A |
PURPOSE: To reduce the redundancy of a circuit and to form all the filter circuit forms, by decreasing the number of capacitors and switches in a general-purpose switched capacitor filter (hereinafter SCF). CONSTITUTION: Switched capacit...
|
|
JPS5820495B2 |
A sampling filter-detector receives input signals of different frequencies and provides an output, or detect signal, only when the input frequency has a predetermined value essentially equal to the drive frequency of the sampling circuit...
|
|
JPS5863256A |
The moduiator (12) provides a means for simultaneous modulation of two carrier signals (CXR1, CXR2) in quadrature by two input signals (22, 24) in such a way that the gains of the two modulations are exactly the same. A switched-capa...
|
|
JPS5852868A |
PURPOSE: To manufacture a small number of the SCF having many specifications at low cost by changing the area of the capacitor of the SCF and te size of the element of an MOS transistor into desired size by replacing the mask pattern of ...
|
|
JPS5850817A |
PURPOSE: To obtain an optional capacity value by connecting capacitors having a single capacity value and switches in a ladder shape, moving charges stored by an input signal, selecting an adequate combination of capacitors, and inputtin...
|
|
JPS5842310A |
PURPOSE: To attain small sized filter and to make circuit integration easy, by selecting an input resistor and a feedback resistor ratio to a specified value or below. CONSTITUTION: An operational amplifier OP1 having an input resistor R...
|
|
JPS5839108A |
PURPOSE: To realize a high-precision filter coefficient, by fixing the gain of a characteristic variable switched capacitor film itself and providing another gain varying means. CONSTITUTION: A characteristic variable switched capacitor ...
|
|
JPS5834700A |
An exemplary embodiment includes a plurality of parallel signal channels coupled with a signal input transducer, such as a microphone or induction coil. Each of the signal channels includes a respective bandpass filter for selection of a...
|
|
JPS5828425U |
|
|
JPS5829213A |
PURPOSE: To compensate amplitude distortion generated in an operational amplifier, by giving prescribed capacity values to four capacitors in a delay equalizer composed of dual secondary type switched capacitors. CONSTITUTION: An input s...
|
|
JPS5819015A |
PURPOSE: To change a band pass frequency or a cut-off frequency automatically and periodically, by providing a current control means periodically changing a current flowing to an integral network so that the pass frequency band can be ch...
|
|
JPS5819016A |
PURPOSE: To obtain an arbitrary attenuation to a signal with an arbitrary amplitude, by sampling an input signal with a control signal and changing the attenuation of the signal through the variable duty cycle. CONSTITUTION: A signal is ...
|
|
JPS5819010A |
PURPOSE: To prevent the generation of distortion, by providing a charge/discharge circuit consisting a resistor and a capacitor for a switching circuit, in an attenuator changing the attenuation through the change of duty cycle of sampli...
|
|
JPS5817718A |
PURPOSE: To decrease the number of operational amplifiers by one, through the operation of one operational amplifier as an output integrator and an operational amplifier for feedback coefficient integration with time division. CONSTITUTI...
|
|
JPS585873A |
PURPOSE: To reduce the number of power source terminals by connecting a power source for an operational amplifier to a discharge path and using a bias circuit for applying bias to noninversion input terminal of the operational amplifier ...
|
|
JPS583308A |
PURPOSE: To form an offset erasing circuit advantageous for circuit integration, by using an integral network and a subtraction circuit not including a resistor. CONSTITUTION: An integral network 15 and a subtraction circuit 11 are forme...
|
|
JPS581319A |
PURPOSE: To fix the transfer characteristics of a switched capacitor type electronic circuit on the basis of a frequency division ratio logically determined by varying a period when a sitch is turned on and off at the same rate for every...
|
|
JPS58164A |
PURPOSE: To eliminate the necessity for unit parts for forming a low-pass filter and make a circuit system more compact, by forming the low-pass filter for removing reflected noises as an RC active filter whithin the same IC chip for a s...
|
|
JPS57204623A |
PURPOSE: To obtain a signal voltage dividing circuit having high accuracy, by connecting another switch to a switch having the 1st and 2nd contacts and adding the holding capacitance to the joint between the 1st and 2nd switches obtained...
|
