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JPS6376612A |
PURPOSE: To cause the low pass filter of a final stage to be sufficient with a simple constitution to remove a high frequency component by using a voltage generating circuit and a sample holding circuit and converting the pulse rate of a...
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JPS6373705A |
PURPOSE: To simplify the constitution of filter eliminating undesired component by providing a phase shifter obtaining two signals having a phase difference of 90° from each other, an absolute value circuit obtaining each absolute value...
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JPS6314912B2 |
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JPS6365378A |
PURPOSE: To perform fast conversion by integrating an input signal at every desired period by a T/V converter, sampling the peak value of its integral value, and converting the signal into a period voltage of each desired period. CONSTIT...
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JPS6362410A |
PURPOSE: To attain the amplification with high gain by applying peak hold at first, demodulating the result at a filter in demodulating and amplifying a PAM signal and amplifying the demodulated signal. CONSTITUTION: A signal made into a...
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JPS6337263A |
PURPOSE: To enhance quantizing accuracy, by detecting the count noise of a clock pulse at the time of quantization and correcting a count value corresponding to said noise. CONSTITUTION: At first, an input wave form is made synchronous t...
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JPS6336603A |
A digital frequency demodulator circuit works on the principle of determining the number of zero crossings of a band-limited input signal in a given period of time, in corresponding prior art analog circuits. The circuit includes an anal...
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JPS6326119A |
PURPOSE: To attain highly accurate interpolation by applying over-sampling at a frequency being twice the 1st sampling frequency and using data twice the original data obtained by the over-sampling so as to apply approximation to new dat...
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JPS6313521A |
PURPOSE: To obtain a pulse density modulator whose circuit design is easy by connecting plural stages of means converting a signal into a PCM signal having a few bit length and a high clock frequency in cascade. CONSTITUTION: Data bit le...
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JPS639211A |
PURPOSE: To increase the demodulation sensitivity by adding a circuit bringing a pulse width τcof an output wavefo/n of a pulse count circuit into a pulse width τc-at (At is a pulse interval). CONSTITUTION: The 1st pulse generating cir...
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JPS62263413A |
PURPOSE: To always detect the voltage value of a pulse-like analog voltage signal at an optimum time while avoiding the transitional effect of a wave form, by making the time interval from the front edge of the pulse-like signal to the p...
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JPS6253782B2 |
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JPS6253784B2 |
PURPOSE:Dynamic coupling is achieved with a simple circuit and higher reliability as compared to an analog type is obtained by taking the exlusive-OR of the signal having undergone waveform shaping in an FF circuit and the having undergo...
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JPS6253088B2 |
This invention relates to a method of converting a digital signal into an analog signal and a digital-to-analog converter therefor. In the invention, a digital signal having varying pulse width values is converted into a first pulse widt...
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JPS62255874A |
PURPOSE: To execute a check of an analog signal outputting circuit at high speed by providing a converting circuit having the same constitution as that of the analog signal outputting circuit, and comparing an output from the converting ...
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JPS62235813A |
PURPOSE: To prevent the output of an integration voltage from being disturbed remarkably, or rised by providing an integration circuit, a fault supervisory circuit and a holding circuit holding an output signal. CONSTITUTION: An output s...
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JPS62159006U |
A circuit for compensating change in delay time of a delay circuit due to variation in temperature employs, as a phase shifter of a pulse FM detection circuit, a delay circuit whose delay time is subject to change due to variation in tem...
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JPS62203392A |
PURPOSE: To accelerate the responding speed of an optical modulator, and to perform stabilized frequency modulation by a method wherein optical output is monitored, the envelope of the optical output signals is detected, and feedback con...
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JPS62141221U |
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JPS6233363Y2 |
In a pulse counter-type FM detector circuit for obtaining audio signals at an output terminal by detecting FM signals in the following order through a limiter circuit, a trigger pulse generating circuit, a monostable circuit and an integ...
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JPS62193305A |
PURPOSE: To very easily compensate the influence of linear as well as nonlinear transmission line distortion upon an FM signal to demodulate the signal by adding a distortion generator, which has the same distortion characteristic as a t...
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JPS62139409A |
PURPOSE: To superpose an analog signal to a PFM signal with a simple equipment and to reduce the cost of transmission by executing the PFM modulation of an analog signal and modulating the amplitude of another analog signal to form an an...
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JPS62136907A |
PURPOSE: To improve the S/N of a demodulated FM signal by using n-set of counters so as to count clock pulse numbers plural half periods shifted at an interval of a half period independently based on a half period of the FM signal thereb...
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JPS6221069Y2 |
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JPS62109424A |
PURPOSE: To prevent the nonlinear distortions caused by the unbalance of an output current by using the 1st constant current source which flows a current to an output circuit and the 2nd constant current source which draws in the current...
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JPS6275640U |
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JPS6275641U |
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JPS6273631U |
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JPS6295769A |
PURPOSE:To provide an optional transmission characteristic to data by interleaving a sound digital data outputted from a signal processing section at each optional sampling period, reading the result and processing it by a digital signal...
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JPS6214755Y2 |
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JPS6244645U |
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JPS6259404A |
PURPOSE: To obtain a sufficient detection output with a simple LPF by eliminating an undesired AC component included in a pulse signal generated from a pulse generating circuit while using a subtractor circuit. CONSTITUTION: An FM signal...
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JPS6259403A |
PURPOSE: To obtain a high demodulation sensitivity by forming a pulse signal from n-set of frequency division signals obtained from frequency division of an input signal and synthesizing and smoothing the pulse signals. CONSTITUTION: A l...
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JPS6237451U |
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JPS6230429U |
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JPS6218679U |
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JPS624895B2 |
A monostable multivibrator circuit is disclosed. It is characterized by comprising a time constant circuit which includes a capacitor, an amplifier circuit which receives an output signal of the time constant circuit and in which a signa...
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JPS61195634U |
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JPS61184330U |
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JPS61173069U |
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JPS61237266A |
PURPOSE:To restore a good analog signal during reproducing a digital signal by optionally changing a pulse duration of a pulse amplitude modulating signal when converting the digital signal into a analog signal. CONSTITUTION:A PCM signal...
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JPS6147005B2 |
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JPS6146898B2 |
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JPS6145887B2 |
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JPS6145784B2 |
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JPS61224385A |
PURPOSE: To obtain the APC characteristic without deterioration of a straight property and an extinction coefficient to a marking rate of a detecting signal CONSTITUTION: When a complementary digital signal is inputted in a base of Trs 1...
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JPS61204572A |
PURPOSE: To execute the monolithic integration and to select the polarity of the output voltage by constituting the reference voltage by a switched capacitor integrator, a pulse generating device and a switch control circuit. CONSTITUTIO...
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JPS61192104A |
PURPOSE: To attain the transmission with high S/N by ORing exclusively a signal retarding a received FM signal for a prescribed time and the received FM signal so as to lower the lower limit of an oscillated frequency at the transmission...
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JPS61182319A |
The present invention discloses a low order charge-pump filter operable with a single variable current source. The integrating capacitor of the charge-pump is connected in an H-bridge switching configuration with four switches that are o...
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JPS6133415B2 |
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