Document |
Document Title |
JPH0418481B2 |
|
JPH0478214A |
PURPOSE: To reduce the effect of jitter caused by sampling an asynchronous input data by outputting a control signal in response to a jitter component and obtained through the comparison between a main sample value and a pseudo sample va...
|
JPH0468808A |
PURPOSE: To easily increase a specified constant with a resistor and a capacitor having small values by connecting a switching means for ON/OFF in a fixed cycle to the input side of a low-pass filter circuit to pass a low frequency. CONS...
|
JPH048966B2 |
|
JPH046145B2 |
|
JPH0420017A |
PURPOSE: To reduce the circuit scale and to decrease the chip size by forming an SC circuit in which a D/A converter(DAC) and a switched capacitor (SCF) are integrated. CONSTITUTION: Input capacitors of an SC circuit 1 employs plural cap...
|
JPH03293810A |
PURPOSE: To compensate the error factor due to analog switches provided for switching of the cut-off frequency by compensating the gain by a ratio of the resultant capacity of capacitors in an input part to that in an output part. CONSTI...
|
JPH0380369B2 |
A combined phase detector and low pass filter comprises charge storage means (10) which is responsive to an input signal (VI) and which is charged to a level dependent upon the magnitude and phase of the input signal in response to a fir...
|
JPH0380368B2 |
|
JPH03286616A |
PURPOSE: To realize a filter of a video band whose circuit integration has been difficult so far by devising a transistor(TR) circuit so that its gain and its cut-off frequency both depend on a capacitance ratio. CONSTITUTION: A differen...
|
JPH03117938U |
|
JPH0376060B2 |
|
JPH03250911A |
PURPOSE: To reduce noise to the utmost by forming a switched capacitor integrator of a switch, a capacitor and a differential amplifier. CONSTITUTION: When an input signal VIN is inputted to an input terminal 1 and a clock 1 reaches a hi...
|
JPH03242025A |
PURPOSE: To reduce noise and to make distortion low by making a signal on an addition node an analog signal that corresponds to digital input data and making the capacitance of a signal capacitor represent a tap weight coefficient which ...
|
JPH03234111A |
PURPOSE: To decrease an offset voltage by controlling a signal turning on/off a switch connecting to each capacitive element so as to select a capacitive element thereby decreasing a DC transfer gain from an noninverting input of an oper...
|
JPH03504788A |
A switched capacitor digital-to-analogue converter employing a single capacitor C, common to a plurality of bits b,bw-1, appropriate weighting of the bits being achieved by switching waveforms A0 to Aw-1.
|
JPH0363848B2 |
An operational amplifier has a bias stage, a sampled differential stage, and a push-pull cascode stage. Unlike the conventional operational amplifier, the sampled differential stage is adopted in place of a differential stage has switche...
|
JPH03206707A |
PURPOSE: To reduce the definite GB product of an operational amplifier OP and to attain low power consumption by attaining addition with one operational amplifier, and forming a switched capacitor circuit. CONSTITUTION: The circuit consi...
|
JPH03207108A |
PURPOSE: To perform full-wave rectification in the center of an input waveform at all times by supplying the output of an extracting circuit which extracts only the DC voltage of an input voltage as the reference voltage of an amplifying...
|
JPH03201617A |
PURPOSE: To realize the change of a delay time without causing the fluctuation of a passing frequency band by controlling the read of a capacitor array to successively store the outputs of an input amplifier. CONSTITUTION: A capacitor ar...
|
JPH03181218A |
PURPOSE: To attain the application of the same equalizer to different transmission speeds by varying the sample frequency of a root-f equalizer. CONSTITUTION: The frequency characteristic of a root-f filter RTFEQ is moved in parallel on ...
|
JPH03166804A |
PURPOSE: To remove a beat frequency by using a 1st switch capacitor circuit as an input to a 1st amplifier of an FM detector and a 2nd switch capacitor circuit as a feedback element of a 2nd amplifier. CONSTITUTION: An FM detector 100 co...
|
JPH03165118A |
PURPOSE: To cancel the offset voltage of an operational amplifier and to extract an output continuously by providing two switched capacitor circuits so as to operate complementarily, and an output selection circuit selecting the output a...
|
JPH0345570B2 |
A multiplexer samples multiple analog waveform signals to provide a sequence of input signals to an active low-pass filter. The bandwidth of the filter is determined by an input RC network having series resistance and shunt capacitance e...
|
JPH03160814A |
PURPOSE: To widen the band with an excellent amplitude phase characteristic by using a shift register, a capacitor and an input output switch to operate a delay register for obtaining the constitution similar to an acyclic digital filter...
|
JPH0342730B2 |
A switched capacitor filter having the same value of capacitance for the integrating capacitor of each filter channel. The use of the same value capacitance results in DC offset voltages for each channel being identical and easy to corre...
|
JPH03150926A |
PURPOSE: To satisfy requests of low distortion and low noise by compensating the fluctuation of the electric capacity of a signal transmitting capacitor by the comparison with resistance in this circuit. CONSTITUTION: A switch capacitor ...
|
JPH0338787B2 |
|
JPH0336328B2 |
A capacitor simulator circuit comprises a first node, a first capacitor coupled between a second node and a reference potential, a second capacitor coupled between a third node and a reference potential, a resistor coupled between the fi...
|
JPH0389633A |
PURPOSE: To eliminate the necessity for an analog circuit for supplying a clock signal to a sampling data filter function by setting up a local oscillator, so that a 2nd frequency is made equal to a value obtained by a 1st frequency by a...
|
JPH0324087B2 |
A switched capacitor adaptive line equalizer for use in digital communication system adapted to receive input signals at a plurality of signal rates and to supply equalized output signals. Input signals are sent through a switched capaci...
|
JPH0376309A |
PURPOSE: To obtain a switched capacitor circuit operated properly without increasing in power consumption and chip size even at the time of driving by low voltage by decreasing a threshold voltage of a CMOS switch so as to decrease its O...
|
JPH0322727B2 |
A general purpose active filter which can be fabricated as a single, monolithic IC. The IC includes two independent filter building blocks. Each filter block includes a pair of serially connected summers and a pair of serially connected ...
|
JPH0322728B2 |
A dynamic amplifier circuit, specifically for switched-capacitor filters, having a current source which supplies an exponentially-decreasing bias current. In addition, a current source is included for supplying an additional bias current...
|
JPH0322726B2 |
|
JPH0322090B2 |
|
JPH0322094B2 |
|
JPH0316804B2 |
|
JPH0314365B2 |
|
JPH0311567B2 |
|
JPH0311038B2 |
A leakage current between the inverting input terminal and the output terminal of an operational amplifier having a switch between the two terminals is prevented from flowing by equalizing the potentials at the two terminals of the switc...
|
JPH0334717A |
PURPOSE: To set the entire filter characteristic to an optimum value by comparing an input signal level to a filter circuit with a signal level after passing through the filter, calculating a required bias voltage, converting the voltage...
|
JPH0333988A |
PURPOSE: To simplify the constitution of a switched capacitor circuit by connecting a capacitor between the common connecting point of the first serial body and the common connecting point of the second serial body. CONSTITUTION: One end...
|
JPH039645B2 |
The input terminal of a voltage follower is coupled to a point of reference potential via a first capacitor. A second capacitor is alternately connected across a source of input signals and connected in parallel with the voltage follower...
|
JPH0330509A |
PURPOSE: To output a signal, in which a repeated component is not included, by providing an active RC low-pass filter which is provided in the front stage of a switched capacitor low-pass filter and interrupts components more than 1/2 in...
|
JPH035684B2 |
|
JPH031740A |
PURPOSE: To prevent the deviation of a tuning frequency based on a change in the ambient temperature by providing the reception circuit side with a couple of switched capacitor filters(SCF) separating a transmission signal into two recep...
|
JPH0262968B2 |
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...
|
JPH0262969B2 |
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...
|
JPH02305107A |
PURPOSE: To obtain a filter with broad band characteristic by providing a means to allow a PLL circuit to control a steep change in a control signal, and driving the PLL circuit with a reference signal having a frequency fref in a freque...
|