Amplitude and phase adjustment circuit

Details Amplitude and phase adjustment circuit Amplitude and phase adjustment circuit

1996-08-01

1998-09-22

Wong, Peter S.

Electricity: power supply or regulation systems

For phase shift or control

By splitting and combining

323218, 333117, 333121, G05F 100

Patent

active

058119612

ABSTRACT:
An amplitude and phase cancellation circuit for modifying or reducing the phase and amplitude of a signal includes a quadrature hybrid having four ports. A first port receives an input signal and a fourth port outputs an output signal derived from the input signal. The remaining two ports are connected to circuit sections having tuneable and adjustable components for selectively varying the phase and amplitude of the output signal. When the output signal is combined or mixed with an external signal, the circuit allows for selective adjustment or cancellation of components of the external signal by generating an output signal having a phase angle opposite to and amplitude equal to the external signal components for which cancellation is desired.

REFERENCES:
patent: 4763074 (1988-08-01), Fox
patent: 5557247 (1996-09-01), Vaughn, Jr.
patent: 5619061 (1997-04-01), Goldsmith et al.

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