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US 4,015,218 AGranted
Temperature compensated solid-state oscillator
AssigneeInventronics, Inc.
InventorAlbert E. Sanderson
Life of this patent
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Abstract
Temperature-compensated solid-state oscillators. A temperature sensitive voltage regulator provides to the oscillator a supply voltage which varies in accordance with a temperature-dependent voltage across a diode junction in the oscillator timing circuit. The oscillator frequency thereby remains substantially constant over a wide range of ambient temperatures and input voltages.
Claims16
A temperature stable oscillator network for connection to a power source for producing an alternating current output signal, said network comprising:
- A. an oscillator circuit including:
- i. semiconductor switching means having common terminal means for connection to the power source, power input terminal means, control input terminal means and diode junction means including a diode junction connected to said control input terminal means to be forward biased by a voltage thereat, and
- ii. timing means for controlling the frequency of oscillation produced by said switching means, said timing means being connected to said control input terminal means for controlling conduction through said diode junction means;
- and
- B. voltage regulator means including:
- i. variable conduction means in series between the power source and said oscillator circuit and with input terminal means for connection to the power source, output terminal means connected to said timing means and to said power input terminal means thereby to apply a single voltage simultaneously to both said timing means and said switching means, and control terminal means, and
- ii. control means connected to said control and output terminal means for generating a control signal that varies proportionally with variations in the voltage across said diode junction means that are induced by temperature variations thereby to control the conductivity between said input and output terminal means of said variable conduction means and to vary the voltage that energizes both said timing means and said switching means proportionally as the voltage across said diode junction means, thereby to stabilize the frequency of the alternating current output signal from said oscillator network as a function of temperature.
4 more elements
Dependencies are inferred from the claim text.