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JPH04123624U |
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JPH0469450B2 |
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JPH04307813A |
PURPOSE: To obtain sure oscillation of a control clock and a stable oscillation rising characteristic. CONSTITUTION: The device is provided with an oscillation circuit 4 generating a control clock for the integrated circuit and a voltage...
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JPH04302510A |
PURPOSE: To make the oscillator inexpensive and small in size by decreasing the number of components. CONSTITUTION: The oscillation output of a clock oscillator 11 which varies in oscillation frequency monotonously with temperature is su...
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JPH0461522B2 |
A temperature compensating circuit for a piezoelectric crystal includes a thermistor circuit coupled to a transistor to cause the output voltage derived from the transistor to decrease as the temperature increases from a cold temperature...
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JPH0441604Y2 |
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JPH04505533A |
An automatic voltage-controlled oscillator (VCO) current control circuit, that senses a voltage in the VCO representative of the current of the VCO, compares that voltage to a reference voltage, and applies the voltage resulting from tha...
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JPH04236507A |
PURPOSE: To realize the digital control temperature compensation crystal oscillator in which dispersion in a voltage control crystal oscillator is compensated. CONSTITUTION: Offset data to compensate dispersion in a voltage control cryst...
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JPH0449283B2 |
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JPH04179157A |
PURPOSE: To improve reliability by performing constitution from an oscillation part for generating prescribed oscillation signals, a voltage pump driving part for generating clock signals, a voltage pump part for generating a negative su...
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JPH04503447A |
A voltage-controlled oscillator includes a compensating signal value calculator which calculates the value of a function representing the portion of the oscillator temperature-frequency transfer curve corresponding to the ambient tempera...
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JPH04167805A |
PURPOSE: To form a stable oscillator against a microphonic noise by forming a space condition of the oscillator with a shield case main body and a printed circuit board with the oscillator mounted thereon. CONSTITUTION: A partition plate...
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JPH0466825U |
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JPH04157922A |
PURPOSE: To suppress a sudden phase change in a time required for satellite communication by interrupting temperature compensation tentatively based on a temperature data or predicting the temperature data in a digital control type tempe...
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JPH04143617A |
PURPOSE:To reduce errors due to a change in temperature of a circuit by a construction wherein a circuit for feeding back negatively an output voltage of an f-V conversion circuit to an amplifier circuit is provided between the output si...
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JPH0429257B2 |
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JPH04142812A |
PURPOSE: To make the output of a phase comparator stable with less power consumption and simple configuration by inputting an output fluctuation of the phase comparator to one terminal of a differential amplifier, detecting it by an erro...
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JPH04124913A |
PURPOSE: To realize highly precise frequency stability in good massproductivity by executing the generation and the write-in of compensating data by a built-in computer. CONSTITUTION: The output of a voltage controlled piezoelectric osci...
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JPH04106606A |
PURPOSE:To easily make fine adjustment from the outside by providing a resistance for dropping voltage which offsets the temperature dependency of the base-emitter voltage of a bipolar transistor by controlling the collector current of t...
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JPH0497619A |
PURPOSE: To realize a stable temperature compensation oscillator against a transient temperature fluctuation 3 as well by sealing an oscillator main body to a low thermal resistance substance. CONSTITUTION: The entire part of a direct te...
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JPH0497618A |
PURPOSE: To attain stable temperature compensation economically by increasing the number of control data without increasing the capacity of a storage circuit. CONSTITUTION: A storage circuit 4 stores in advance control data corresponding...
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JPH04501792A |
An oscillator including a first frequency control network having a series coupled inductance and sensor capacitor, a pair of cascaded capacitors, and an emitter follower amplifier coupled thereto. The emitter follower amplifier drives a ...
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JPH0486023A |
PURPOSE: To compensate a temperature to transient temperature fluctuation by sealing an entire circuit into a low-heat resistant material. CONSTITUTION: A temperature detector 1 fitted on a printed circuit board 4, temperature compensati...
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JPH0482417A |
PURPOSE: To attain high stabilization by inputting two control signals to a voltage controlled oscillator, applying a high temperature compensation voltage on one of them, and decreasing the quantization error of an application temperatu...
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JPH0468903A |
PURPOSE: To bring an oscillating frequency to a prescribed frequency accurately by controlling a temperature of a crystal resonator based on a difference between a frequency n times the frequency of the fundamental wave vibration and the...
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JPH0456515A |
PURPOSE: To decrease the fluctuation due to a quantized error by resolving a control voltage into two components, generating a linear voltage component being one of two components of a control voltage from a compensation analog voltage g...
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JPH0419835U |
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JPH045288B2 |
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JPH0423505A |
PURPOSE: To make the circuit stable to temperature fluctuation by setting the current of the constant current source of a differential amplifier being one part of constitution of an oscillator, to be directly proportional to the thermal ...
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JPH044605A |
PURPOSE: To attain high speed and stable circuit operation by providing a temperature sensor outputting a voltage depending definitely on temperature and odd number stage gates receiving an output of a latch circuit and forming the circu...
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JPH03252216A |
PURPOSE: To reduce the variance of the oscillation frequency due to temperature change by inverting and amplifying a voltage corresponding to the current flowing to the resistance connected to a MOSFET and adding the output to a prescrib...
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JPH0349453Y2 |
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JPH03231517A |
PURPOSE: To attain the temperature compensation of an oscillated frequency by providing an electromagnetic converter controlling a digital code outputted from an A/D converter, an input digital code to a D/A converter and an input digita...
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JPH03231516A |
PURPOSE: To obtain a highly stable signal by calculating a data for frequency control with a data read from a storage circuit in response to an address signal, converting the calculated data into an analog signal and controlling the osci...
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JPH03229502A |
PURPOSE: To highly accurately compensate a temperature by connecting a crystal resonator to an oscillation circuit, oscillating and outputting two different frequencies, reading one frequency as address map data of a storage element, rea...
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JPH0363262B2 |
The phase modulator apparatus for generating a burst phase-modulated wave comprises a carrier generator (1) for generating a carrier wave, a phase modulator (3) for phase-modulating the carrier wave with an input information signal, an a...
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JPH03218120A |
PURPOSE: To warrant stable operation by applying the frequency control of a temperature compensation type piezoelectric oscillation circuit at nontransmission or nonreception state of a communication equipment and not applying the freque...
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JPH0362325B2 |
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JPH0339926Y2 |
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JPH03175737A |
PURPOSE: To stably start up oscillation by detecting no output from a voltage control oscillator, increasing the amplification factor of an amplification part in the voltage control oscillator and supplying a clock pulse from a clock gen...
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JPH03157018A |
PURPOSE: To reduce a channel switching time and to make the synthesizer stable against a temperature change by connecting a 2nd varactor diode to the oscillator of a voltage controlled oscillator(VCO), and applying a DC voltage corrected...
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JPH0339411B2 |
The invention relates to a temperature-compensated oscillator device comprising a temperature sensing section (1) including a temperature sensor (11) for sensing an ambient temperature to provide a temperature data signal representative ...
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JPH03126304A |
PURPOSE: To attain miniaturization and low power consumption by providing a DC conversion means converting temperature information into another temperature information having a polygonal line characteristic approximating a frequency temp...
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JPH03126303A |
PURPOSE: To facilitate the circuit integration by using an oscillation active element as a temperature sensing element and a frequency control element. CONSTITUTION: A capacitance of a depletion layer of pn junction between the base and ...
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JPH03110906A |
PURPOSE: To prevent fluctuation of geometrical distance between the shield case and the oscillator main body, to suppress the fluctuation of the oscillating state due to vibration and to obtain a stable oscillation output by making a shi...
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JPH0321050Y2 |
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JPH0321053Y2 |
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JPH0392014A |
PURPOSE: To eliminate the need for a mechanical control terminal and to attain small size and low cost by sending/receiving a digital code contactlessly by means of light medium. CONSTITUTION: An electrooptic converter 6 capable of contr...
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JPH0324815B2 |
A temperature-compensating bias circuit for biasing a transistor circuit such as a multivibrator is disclosed. In the bias circuit, a series circuit formed of a first resistor and a parallel circuit consisting of a first circuit includes...
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JPH0377434A |
PURPOSE: To correct a deviation between a frequency of a reference frequency oscillating circuit and a frequency of a reception input from an intermediate frequency amplifier circuit due to a secular change or the like automatically by a...
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