Digital programmable phase shifter and A/D converter using such

Details Digital programmable phase shifter and A/D converter using such Digital programmable phase shifter and A/D converter using such

1997-09-30

1999-03-02

Young, Brian

Coded data generation or conversion

Sample and hold

341155, H03H 718

Patent

active

058777130

ABSTRACT:
The invention relates to a programmable phase shifter PS receiving an input signal Vin to be phase-shifted, of the form A.cos .omega.t, a digital A'.cos (.omega.t-X), the phase shift value X being defined by the control signal in phase quadrature with the input signal Vin of the form A.sin .omega.t, a first multiplier 20 and a second multiplier 30, the first multiplier 20 supplying a signal resulting from the multiplication of the signal Vin by a value which is substantially equal to V.cos (X), the second multiplier 30 supplying a signal resulting from the multiplication of the output signal of the quadratic module by a value which is substantially equal to V.sin (X), an adder 40 supplying a signal Vout of the form A'.cos (.omega.t-X) resulting from the sum of the output signals of the multipliers 20 and 30. According to the invention, the control V.sin (X), each multiplier 20 and 30 having an input of a digital type provided with means for effecting a digital multiplication.

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