Oscillators – Polyphase output
Patent
1999-06-15
2000-09-26
Mis, David
Oscillators
Polyphase output
331 50, 331 57, 331117R, 331172, H03B 512, H03B 536, H03B 2700
Patent
active
061247634
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.degree. phase shift between the input and output currents of each cell.
REFERENCES:
patent: 5561398 (1996-10-01), Rasmussen
patent: 5561399 (1996-10-01), Haartsen
Galanthay Theodore E.
Mis David
STMicroelectronics S.A.
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