Oscillators – Solid state active element oscillator – Transistors
Patent
1982-09-13
1984-07-10
Grimm, Siegfried H.
Oscillators
Solid state active element oscillator
Transistors
368159, H03B 536
Patent
active
044595654
ABSTRACT:
A low current electronic oscillator system includes an oscillator tuning element, such as a piezoelectric crystal, operable at a predetermined frequency and an oscillator control circuit for cooperating with the tuning element to provide an oscillating electrical signal at the predetermined frequency. The control circuit includes first and second electrical charge storage devices coupled to a first portion of the tuning element; a first current drive device connectable to a first terminal of an applied electric potential and responsive to a first voltage on the first charge storage device for applying a first drive current to a second portion of the tuning element; and a second current drive device connectable to a second terminal of the electric potential and responsive to a second voltage on the second charge storage device for applying a second drive current to the second portion of the tuning element. The voltages on the first and second storage devices are maintained at different levels to inhibit the flow of current between the first and second terminals of the electric potential during oscillator operation.
REFERENCES:
patent: 3887881 (1975-06-01), Hoffmann
patent: 4060772 (1977-11-01), Yamada et al.
patent: 4106278 (1978-08-01), Yasuda
Grimm Siegfried H.
Grossman Rene E.
Heiting Leo N.
Sharp Melvin
Texas Instruments Incorporated
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