Residual mode phase locked loop

Details Residual mode phase locked loop Residual mode phase locked loop

1982-01-08

1985-01-22

Laroche, Eugene R.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural a.f.s. for a single oscillator

331 8, 331 15, 331 17, 331 25, 328167, H03L 708, H03B 112, H04B 1500, H03D 324

Patent

active

044954751

ABSTRACT:
A phase locked loop is disclosed which subtracts an estimated signal from an input signal and operates upon the residual signal. The residual signal is demodulated and applied to a controlled oscillator which produces feedback signals approximately the sine and cosine of the input signal. The cosine feedback signal is multiplied by the residual signal whose resultant signal is a frequency correction signal. The sine feedback signal is multiplied by the residual signal for multiplication again by the sine feedback signal to produce the estimated signal which is amplitude and frequency controlled. This signal is then subtracted from the input signal to reduce the residual signal to near zero.

REFERENCES:
patent: 3633117 (1972-01-01), Reilly, Jr.
patent: 4027264 (1977-05-01), Gutleber
patent: 4037165 (1977-07-01), Ogita

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