Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Phase shift by less than period of input
Patent
1997-08-08
1999-07-20
Ton, My-Trang Nu
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Phase shift by less than period of input
327254, H03H 1116, H03K 300
Patent
active
059260521
ABSTRACT:
A circuit and method for producing a phase shifted quadrature signal (VOUT) from an in-phase signal (VIN). The in-phase signal (VIN) is applied to the control electrode of a voltage follower (121). The voltage follower (121) has a variable output resistance which combines with a capacitor (123) to delay the input signal (VIN) in accordance with the time constant formed by the variable output resistance and the capacitor (123). The variable output resistance is controlled by adjusting the bias current of the voltage follower (121) with a control signal.
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Dow Stephen W.
Durec Jeffrey C.
Lovelace David K.
Coleman Sharon K.
Hoshizaki Gary
Motorola Inc.
Nu Ton My-Trang
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