Digital phase shifter

Details Digital phase shifter Digital phase shifter

1986-03-03

1987-06-30

LaRoche, Eugene R.

Oscillators

Automatic frequency stabilization using a phase or frequency...

With reference oscillator or source

331 20, H03L 700

Patent

active

046773959

ABSTRACT:
A digital phase shifter uses a heterodyne concept to mix a continuous wave (cw) signal with a local oscillator which is an integer multiple of the difference frequency. The difference frequency is phase-locked, and the local oscillator frequency is divided into N increments by a counter. The count of the counter is compared to a microprocessor generated phase shift value which is added to the difference frequency. The phase shifted difference frequency is then converted up to produce the phase shifted continuous wave signal.

REFERENCES:
patent: 4042884 (1977-08-01), Querry
patent: 4056761 (1977-11-01), Jacoby et al.

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