Saw oscillator gain amplifier with auto phase shift

Details Saw oscillator gain amplifier with auto phase shift Saw oscillator gain amplifier with auto phase shift

1992-11-20

1994-04-19

Pascal, Robert J.

Oscillators

Solid state active element oscillator

Significant distributed parameter resonator

331107R, 331DIG3, 307511, 307231, H03B 512

Patent

active

053049586

ABSTRACT:
A gain stage for providing an automatic phase shift is provided. In particular, the gain stage detects whether an oscillation signal appears at its inputs. If an oscillation signal is not detected, then the gain stage inverts output signals occurring at outputs of a first amplifier before being respectively applied to inputs of a second amplifier. This has the overall effect of implementing a 180.degree. phase shift of a signal appearing at the outputs of the gain stage with respect to a signal appearing at the inputs of the gain stage.

REFERENCES:
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patent: 4272736 (1981-06-01), Gercekci et al.
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patent: 5156666 (1992-09-01), Tamagawa
patent: 5204674 (1993-03-01), Holben
"Missing-Pulse Detector Handles Variable Frequencies", by Joe Lyle and Jerry Titsworth, Electronics Apr. 12, 1979 p. 131.
"Voltage Controlled Surface Wave Resonator Oscillators", by Lawrence H. Ragan Texas Inst. Inc., 1976 Ultrasonics Symposium Proc., IEEE Cat. #76.

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