Calibratable programmable phase shifter

Details Calibratable programmable phase shifter Calibratable programmable phase shifter

1998-01-30

2000-08-15

Cunningham, Terry D.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Having specific delay in producing output waveform

327284, H03H 1126

Patent

active

061042234

ABSTRACT:
A programmable phase shifter includes a tapped delay line for successively delaying a periodic reference signal to produce a set of phase distributed tap signals. A multiplexer selects one of the tap signals as input to a programmable delay circuit which further delays the selected tap signal to produce an output signal that is phase shifted from the reference signal. A programmable data converter converts input data indicting a desired phase shift between the reference signal and the output signal into data for controlling the multiplexer selection and the amount of delay provided by the programmable delay circuit. The relationship between conversion table input and output data is adjusted so that the period of the output signal has a desired linear relationship to the input data value.

REFERENCES:
patent: 5589788 (1996-12-01), Goto
patent: 5900762 (1999-05-01), Ramakrishnan
patent: 5963074 (1999-10-01), Arkin

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