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Document Title |
JPH0349422A |
PURPOSE: To obtain an oscillation circuit with high stability although the circuit is compact, energy consumption is reduced and cost is lowered by storing the compensation control voltage value of a voltage control oscillator(VCO) corre...
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JPH0259437B2 |
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JPH02295223A |
PURPOSE: To omit the use of an equipment of a large scale by changing the temperature within a range where the characteristic of a temperature compensated oscillation circuit is assured and producing automatically the correction value at...
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JPH0245837Y2 |
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JPH0249060B2 |
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JPH0243369B2 |
An integrated circuit voltage controlled oscillator (VCO) consists of an astable multivibrator with external fixed components resistor RT and capacitor CT. The multivibrator has a centre frequency timed by constant currents I1 charge and...
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JPH0242244B2 |
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JPH02214310A |
PURPOSE: To quickly make the frequency at the time of starting stable by setting the initial condition of a ROM (initial setting storage circuit) so that a temperature compensation code at rising of a power supply reaches a prescribed va...
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JPH02202719A |
PURPOSE: To write data into a ROM with high efficiency and with no mistake by setting a controller between the ROM of a temperature compensation oscillator and a temperature information signal generator to output the temperature informat...
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JPH0234202B2 |
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JPH02192317A |
PURPOSE: To prevent an oscillation frequency from changing against the change of an environmental temperature or a source voltage by providing an oscillator whose oscillation frequency is provided with characteristic having negative incl...
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JPH02180410A |
PURPOSE: To improve productivity, to reduce costs and to miniaturize the oscillator by setting a reference frequency temperature characteristic obtained with averaging the frequency temperature characteristics of plural crystal oscillato...
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JPH02155312A |
PURPOSE: To prevent the fluctuation of an oscillated frequency to be caused when the temperature is decreased or increased including a compensation code conversion temperature by varying the output of a compensation code to the same temp...
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JPH02134021A |
PURPOSE: To make a frequency with respect to a temperature change stable by using the control voltage of a voltage controlled oscillation circuit(VCO) subjected to PLL(Phase locked loop) control and applying frequency compensation of the...
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JPH0220163B2 |
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JPH02111122A |
PURPOSE: To keep the frequency of an oscillator to nearly a constant value by providing two inverting circuit means, an adder means of their outputs, a feedback means and a control means controlling the oscillating period of an oscillate...
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JPH0228143U |
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JPH026655Y2 |
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JPH0224640U |
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JPH0242817A |
PURPOSE: To prevent an influence due to a leading-in phenomenon and to stabilize a frequency by providing first and second voltage controlled oscillators, and suppressing fluctuation of the oscillatiion central frequency of the first osc...
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JPH026243B2 |
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JPH0218121U |
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JPH0216620U |
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JPH024145B2 |
A circuit arrangement includes an integrated semiconductor circuit with a plurality of connection leads in which stray capacitances with equal temperature coefficients exist between one connection lead and the two adjacent, second and th...
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JPH022721A |
PURPOSE: To stabilize the operation of a voltage controlled oscillator and to prevent step out from being generated by providing an ambient temperature detecting means at a phased locked loop oscillation circuit provided with the voltage...
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JPH01286521A |
PURPOSE: To prevent the fluctuation in the oscillated frequency of an oscillation circuit due to on/off of an amplifier circuit by terminating the output of the oscillation circuit when the amplifier circuit is turned off. CONSTITUTION: ...
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JPH01272322A |
PURPOSE: To drive a semiconductor device at a maximum frequency band for an ambient temperature by changing the oscillation frequency of an oscillator by a signal outputted from an ambient temperature measuring instrument. CONSTITUTION: ...
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JPH01220505A |
PURPOSE: To provide a surface acoustic wave(SAW) oscillator, of which the frequency is exactly controlled, by providing one servo control loop at least for controlling a heating means coupled to a resonator for setting an output frequenc...
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JPH01212005A |
PURPOSE: To substantially improve the total temperature stability of an LC oscillation circuit by distributing a positive feedback path to two partial paths which are a 1st partial path with temperature dependence and a 2nd temperature-n...
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JPH01174105A |
PURPOSE: To simultaneously compensate temperature compensation of plural crystal oscillation sections, to decrease the circuit scale and to attain high reliability and low power consumption by adopting the constitution that plural digita...
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JPH01165209A |
PURPOSE:To perform the adjustment of a central frequency and that of deviation by simultaneous adjustment by the same voltage by using three gm amplifiers and four current sources. CONSTITUTION:A first current source controls the gm of a...
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JPH01114121A |
PURPOSE:To correct the oscillation frequency against a change in the operating environment such as variance at manufacture or temperature change by measuring the frequency of the oscillator periodically based on a basic clock and switchi...
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JPH01108801A |
PURPOSE: To reduce the rotational effect of a correction curve for resetting frequency by connecting a frequency adjusting circuit for adjusting frequency in accordance with temperature to the terminal of a variable capacity element thro...
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JPS6482808A |
PURPOSE: To make this oscillator stable against mechanical vibration, to easily attain operation, and to attain positioning in a simple way by hardly connecting the bottom part of a housing with a cover with a pole positioned at the cent...
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JPS6471212A |
PURPOSE: To reduce power consumption and to eliminate difficulty in usability by forming a circuit as a single integrated circuit based on compound semiconductor technique and almost fixing its oscillation frequency in spite of fluctuati...
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JPS6455910A |
PURPOSE: To prevent a frequency change due to humidity with simple constitution by inserting a fixed resistor in parallel with a variable resistor. CONSTITUTION: A power voltage applied to a power terminal 1 is fed to a high frequency os...
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JPS6451818A |
PURPOSE: To provide a frequency stabilizing means, in which the oscillation frequency is not affected by parameter spread, by feeding back a voltage between both terminals of a reference element on a 2nd current branch to a 1st current b...
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JPS6444122A |
PURPOSE: To improve the temperature resolution and to reduce the power consumption by measuring an increment of a periodic time of a gate signal at each temperature by means of a measuring pulse with/without frequency division of a refer...
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JPS6432531A |
PURPOSE: To attain low-voltage operation and to improve oscillating frequency characteristics by providing an oscillator making oscillation and giving an output and a boosting circuit boosting a signal voltage generated from the oscillat...
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JPS6421514U |
A circuit is provided for frequency drift compensation of a tuning diode in tunable RF-circuits, and comprises a temperature-responsive voltage divider coupled between an independent voltage supply source and a reference potential, the t...
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JPS641969B2 |
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JPS6410729A |
PURPOSE: To exactly control the frequency of a main oscillating part, and to obtain an oscillator to oscillate at a stable frequency against a temperature change by using again the output of the main oscillating part as a standard for a ...
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JPS641968B2 |
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JPS641970B2 |
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JPS6367159B2 |
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JPS63309003A |
A temperature-compensated piezoelectric oscillator of high-spectral purity, capable of being controlled in frequency, consists of a compensation circuit, a processing circuit, a phase-shifting circuit, containing the piezoelectric resona...
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JPS6365160B2 |
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JPS6362924B2 |
A temperature-compensating voltage generator circuit for compensating the temperature characteristics of an electric device whose electrical characteristics vary in accordance with the change of the ambient temperature and can be changed...
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JPS63272225A |
PURPOSE: To realize a compensating circuit capable of improving whose temperature detection sensitivity at a prescribed temperature region by constituting the titled circuit by a temperature sensor section, a reference oscillation sectio...
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JPS6346602B2 |
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