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JPS6354012A |
PURPOSE: To output a difference voltage at one and same time continuously with simple constitution by holding the difference voltage via the 1st and 2nd capacitors controlled by clocks whose phases are deviated to each other and not over...
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JPS639683B2 |
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JPS637487B2 |
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JPS637488B2 |
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JPS637486B2 |
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JPS6335007A |
PURPOSE: To decrease the chip size and to reduce the cost by switching a peak detection capacitor and a frequency of a clock to drive a switched capacitor filter (SCF) in time division. CONSTITUTION: With a clock CP2 at a high level, a f...
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JPS6324709A |
PURPOSE: To vary a cut-off frequency in a range wider than ever keeping constant the circuit constant of a non-sampling filter, by overlapping two switched capacitor filters(SCF). CONSTITUTION: A clock on which n-number of frequency divi...
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JPS634977B2 |
A receiver utilizing a switched capacitor filter is disclosed. The switched capacitor filter has a band pass determined by a control signal applied thereto. A waveform shaping circuit generates the control signal as a function of a recei...
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JPS634728B2 |
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JPS633227Y2 |
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JPS632365B2 |
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JPS632170B2 |
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JPS631773B2 |
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JPS62293812A |
PURPOSE: To select one gain freely among plural kinds of gains by forming a switch control signal making a capacitor setting plural kinds of the gains connect selectively by the write into a FAMOS transistor (TR). CONSTITUTION: Capacitor...
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JPS62291214A |
PURPOSE: To minimize a total capacity value by providing a switch at both ends of a switched capacitor provided at an input part and a feedback part, making it dead to a parasitic capacity and providing an inverting amplifying circuit to...
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JPS6257130B2 |
PCT No. PCT/EP79/00064 Sec. 371 Date May 15, 1980 Sec. 102(e) Date May 15, 1980 PCT Filed Aug. 21, 1979 PCT Pub. No. WO80/00644 PCT Pub. Date Apr. 3, 1980.The invention relates to a filter for electric signals consisting of switches, cap...
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JPS6244597Y2 |
The switched capacitor comprises a capacitor CA1 and a switching element S1 which can be periodically changed over for charging CA1 with an input voltage YIN and for discharging the capacitor CA1 to one input end (A) of an operational am...
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JPS62262510A |
A continuous time electrical filter fabricated as an integrated circuit includes capacitors (CF,CN) and resistors (R1,R2). Since capacitors and resistors are difficult to integrate with accurately defined values a trimming circuit is pro...
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JPS62260416A |
PURPOSE: To attain low power consumption and high circuit integration of a switched capacitor circuit by using a capacitor comprising plural capacitive elements connected in series as the circuit component to decrease the total sum of th...
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JPS62254510A |
PURPOSE: To reduce the chip area by varying the amplification factor of part of or all of an operational amplifier so as to change the characteristic. CONSTITUTION: A capacitor integration device consists of capacitive elements Co, Cf, s...
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JPS62252209A |
A two-phase clock disoverlapper comprises a NAND gate and a NOR gate each provided with a first input clock signal and a second input controlled by a circuit suitable to supply the delayed form of the clock signal, consisting of an analo...
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JPS62249512A |
PURPOSE: To reduce the sum of capacity element values and to reduce the occupied area of an integrated circuit by using an inversional amplifier having the amplification factor of once as an operational amplifier. CONSTITUTION: A switch ...
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JPS62245813A |
A method and circuitry for time-sharing a digitally-programmable capacitive element, particularly in conjunction with a switched-capacitor filter circuit. The method includes: selecting a first capacitance value for the capacitive elemen...
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JPS62230209A |
PURPOSE: To change the time constant without using a variable resistor by providing q control voltage generating circuit outputting a voltage corresponding to a clock frequency and controlling the current of the constant current source b...
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JPS62230107A |
PURPOSE: To attain the sophisticated gain control with high accuracy by adjusting the duty ratio of a pulse signal so as to control the on/off of a switch means switching alternately an integration resistor between an output of an operat...
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JPS62224108A |
PURPOSE: To simplify the circuit and to attain the low power consumption by utilizing an operation amplifier circuit provided in common to other output operation while one of two switched capacitors connected in cascade fetches an input ...
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JPS62221214A |
PURPOSE: To output a correct voltage value though the operation start time is different between transfer switches, by inserting a make switch, whose operation is started at a little bit delay from the operation start of each transfer swi...
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JPS6244448B2 |
A method of and apparatus for determining during an initial training period the initial values of the coefficients of a transversal equalizer in a data transmission system in which the transmission channel creates frequency shift. The re...
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JPS6244444B2 |
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JPS6243564B2 |
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JPS6243562B2 |
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JPS62209913A |
PURPOSE: To obtain the output of plural different characteristic constants with one filter by changing the bracketing of an integrating capacitor and a clock frequency in accordance with the bracketing. CONSTITUTION: At a time T2 (0) whe...
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JPS6243563B2 |
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JPS62183210A |
PURPOSE: To generate simply a table of equations satisfying the 1st and 2nd Kirchhoff's laws and the Ohm's law by adding a new table to a table of an initial set circuit overlappingly for the revision so as to complete the table for the ...
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JPS62180605A |
PURPOSE: To obtain a signal whose state changes without causing a steep change by using a CMOS type resistance element. CONSTITUTION: An input terminal IN is connected to a logical element inverter INV via a CMOS resistance RCMOS, and th...
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JPS62175006A |
PURPOSE: To obtain a reverse phase amplifier by connecting respectively blocks composed by connecting in parallel the circuit, in which two switches are con nected between a terminal and an earth respectively, to both poles of a capaci t...
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JPS62164309A |
PURPOSE: To delete a parastic charge given from respective types of the noise source by fine-adjusting the capacity value of one capacitor or above for adjustment provided between a switching capacitor and a switching clock line. CONSTIT...
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JPS62159518A |
PURPOSE: To attain multiplexing of a quantization loop by providing a sample- and-hold circuit, an input changeover switch and a storage circuit. CONSTITUTION: A switch 100 switching an input signal Vin and an output of a sample-and-hold...
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JPS62151011A |
PURPOSE: To constitute an input circuit where the amplitude of an input signal of a switched capacitor filter is made constant for an optional time within an optional switching period by constituting the input circuit with an on/off swit...
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JPS62150918A |
PURPOSE: To reduce the effect of noise due to parasitic capacitance of a switch by coupling the 2nd switch subject to switch control complementarily to the 1st switch between an equivalent resistance circuit and a ground terminal. CONSTI...
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JPS62150919A |
PURPOSE: To obtain a narrow band frequency discrimination circuit transmitting only a frequency signal being an odd number of times of the sampling frequency by supplying an input signal having a frequency band including a signal being a...
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JPS62143511A |
PURPOSE: To obtain a level adjuster which is high in universal applicability and accuracy, by respectively connecting an input resistance and a feedback resistance using, a switch capacitor equivalent resistance with operational amplifie...
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JPS62123913A |
(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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JPS62118631A |
A synchronous filter for use as a narrow band, band-pass filter comprises a matching circuit receiving a signal to be filtered and supplying that signal to an output connected to filtering paths with switched capacitances connected in pa...
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JPS62117426A |
PURPOSE: To simplify and stabilize the switching operation of the titled variable switched capacitor circuit, by switching the variable switched capacitor circuit in a vacant time zone produced by compressing input signals in block unit ...
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JPS62108610A |
PURPOSE: To apply S-Z conversion of a high-order, especially an odd number order filter by designing the capacitor filter so that a linear switched capacitor filter is not provided independently. CONSTITUTION: Plural switch circuits 1, 8...
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JPS62105516A |
PURPOSE: To reduce the cost of a filter without using any analog delay line by providing the discrete time system of an uncyclic filter with a delay means which has a transfer function nearly equivalent to that of a CR primary circuit an...
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JPS62104209A |
PURPOSE: .To reduce automatically even an offset voltage superimposed on a signal saturated at a different saturation level by decreasing the offset voltage of a summing amplifier circuit saturated at a different saturation level into 1/...
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JPS6292774A |
PURPOSE: To enable MOS type IC to be realized, by sampling input signal voltage with a switched capacitor, and by generating the output of each sample voltage with constant polarity. CONSTITUTION: On a switched capacitor 2A, switches 21,...
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JPS6292512A |
PURPOSE: To vary easily an input/output voltage coefficient by a switched capacitor by controlling the number of transmission and the sampling of an input voltage by capacitors different from the capacitance ratio via a switch for varyin...
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