Balanced feedback oscillators

Details Balanced feedback oscillators Balanced feedback oscillators

1985-05-22

1987-04-28

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331 56, 331116R, 331158, H03B 536

Patent

active

046617850

ABSTRACT:
The oscillator circuit comprises an amplifier having a pair of inputs, a positive feedback path producing a positive feedback ratio to one of the inputs, and a negative feedback path including a series resonant circuit producing a negative feedback ratio to the other of the inputs. The positive and negative feedback paths are independent such that the current in each of the paths can be adjusted independently. In this manner, a high Q multiplier effect is achieved. Also, the circuit has an output path which is separate from the input path so that a high output signal level can be achieved while maintaining a low current through the series resonant circuit.

REFERENCES:
patent: 2742573 (1956-04-01), Seeley
patent: 3569865 (1971-03-01), Healy, III
patent: 3571754 (1971-03-01), Healy, III
patent: 3824495 (1974-07-01), Gerum
patent: 3836873 (1974-09-01), Healey, III et al.
patent: 3878481 (1975-04-01), Healy, III
patent: 3911378 (1975-10-01), Buchanan
patent: 3996530 (1976-12-01), Feistel et al.
patent: 4358742 (1982-11-01), Ferriss

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