Oscillators – Solid state active element oscillator – Transistors
Patent
1983-12-22
1985-07-02
Grimm, Siegfried H.
Oscillators
Solid state active element oscillator
Transistors
331158, H03B 536
Patent
active
045271313
ABSTRACT:
An MOS crystal controlled oscillator circuit is provided which includes a pair of MOS transistors coupled together in complementary fashion to form a first non-inverting stage. The output of the first non-inverting stage is coupled to the input of a second non-inverting stage including a MOS transistor exhibiting a source follower configuration or a bipolar transistor exhibiting an emitter follower configuration. The output of the second non-inverting source follower stage is coupled via a feedback element, for example, a piezoelectric crystal, to the input of the first non-inverting stage. A feedback loop is thus formed which causes the circuit to resonate at a frequency determined by the piezoelectric crystal feedback device. This oscillator configuration results in a degree of insensitivity to variations in parasitic impedance of the piezoelectric crystal feedback device. That is, the oscillator remains operative on the desired resonant frequency despite significant variations in the parasitic impedance associated with the piezoelectric crystal element.
REFERENCES:
patent: 3959744 (1976-05-01), O'Connor
patent: 3979698 (1976-09-01), Gollinger
patent: 4048590 (1977-09-01), Dobberpuhl
patent: 4091338 (1978-05-01), Morihisa
patent: 4321562 (1982-03-01), Igarashi
Davis Walter L.
Herold Barry W.
Downey Joseph T.
Gillman James W.
Grimm Siegfried H.
Motorola Inc.
Roney Edward M.
LandOfFree
Oscillating circuit exhibiting tolerance to crystal impedance va does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Oscillating circuit exhibiting tolerance to crystal impedance va, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oscillating circuit exhibiting tolerance to crystal impedance va will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-383859