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US 4,497,998 AGranted
Temperature stabilized stop-restart oscillator
AssigneeFairchild Camera and Instrument Corporation
InventorBurnell G. West
Life of this patent
Estimating the term…
Abstract
A closed loop integrated circuit temperature stabilizer 10 has an on-chip temperature sensor 12 for supplying a voltage indication of temperature to an op amp 22 which maintains chip temperature equilibrium by controlling a load transistor 30 which draws current through on-chip heating means 16.
Claims4
A temperature stabilized oscillator comprising:
- an oscillator for generating a clock signal;
- a gate connected to the oscillator for switchably connecting the clock signal from the oscillator to at least one output terminal, the gate being fabricated in an integrated circuit;
- at least one additional gate for heating the integrated circuit connected between the oscillator and a first node, each of the at least one additional gate being also fabricated in the integrated circuit;
- a temperature sensor disposed in the integrated circuit for producing signals varying in response to variations in temperature of the integrated circuit;
- and
- a control circuit coupled to the temperature sensor, the first node, and a source of electrical potential, for controlling operation of each of the at least one additional gate in response to the signals from the temperature sensor.
3 more elements
Dependencies are inferred from the claim text.