Oscillator with two outputs in quadrature

Details Oscillator with two outputs in quadrature Oscillator with two outputs in quadrature

2005-11-01

2005-11-01

Mis, David (Department: 2817)

Oscillators

Polyphase output

C331S050000, C331S057000, C331S1170FE, C331S172000

Reissue Patent

active

RE038862

ABSTRACT:
An oscillator includes four identical cells each producing a phase shift of 90 degrees. The output signal from one cell is applied to the input of the next cell, and with the cells looping back to themselves. Each cell includes a current amplifier and a parallel inductance-capacitance resonant circuit configured such that the output current from one cell is a fraction of the capacitive current of the parallel resonant circuit. This causes the 90° phase shift between the input and output currents of each cell.

REFERENCES:
patent: 5561398 (1996-10-01), Rasmussen
patent: 5561399 (1996-10-01), Haartsen
patent: 2009547 (1979-06-01), None

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