LOW-GAIN RANGE PROGRAMMABLE TEMPERATURE-COMPENSATING TYPE VOLTAGE-CONTROLLED OSCILLATOR

PURPOSE: To provide a voltage controlled oscillator which is less affected by the fluctuation of an input voltage signal and has plural low gain frequency ranges and generates an oscillator signal with a frequency fixed against the change of the ambient temperature. CONSTITUTION: A VGS and VSW gener...

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Bibliographische Detailangaben
1. Verfasser:	MAIKERU AASAA BURAUN
Format:	Patent
Sprache:	eng
Schlagworte:	AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES BASIC ELECTRONIC CIRCUITRY EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ELECTRICITY FIXED CONSTRUCTIONS GENERATION OF NOISE BY SUCH CIRCUITS GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT MEASURING MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PHYSICS PULSE TECHNIQUE TESTING
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Beschreibung
Zusammenfassung:	PURPOSE: To provide a voltage controlled oscillator which is less affected by the fluctuation of an input voltage signal and has plural low gain frequency ranges and generates an oscillator signal with a frequency fixed against the change of the ambient temperature. CONSTITUTION: A VGS and VSW generation circuit 310 electrically connected to three equivalent oscillator stages 318, 320, and 322 generates a gate-to-source voltage VGS and a switch voltage VSW in response to range selection signals RSO to RSS4. For the purpose of generating the oscillator signal, a variable resistance value is used to form each low gain range. For this oscillator signal, a small current source is used which supplies a certain current through the variable resistance and is practically independent of temperature, and a current is used which sucks and supplies an additional current to oscillators at the time of the rise and the fall of temperature respectively and is changed by temperature.