Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Patent
1996-04-02
1998-06-16
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
327319, 327333, 327306, 327362, 327554, 326 30, 326 62, H03K 1716
Patent
active
057677220
ABSTRACT:
An electronic circuit having a circuit stage, such as a switched capacitor stage or a 1-bit digital-to-analog converter and switched capacitor filter, that is loaded with a load impedance employs current feedforward to substantially cancel effects of the load impedance. A circuit includes a circuit stage and a load impedance following and connected to the circuit stage. A current feedforward circuit is connected to the load impedance, substantially cancelling the load impedance to improve linearity of the digital-to-analog converter or switched capacitor filter.
REFERENCES:
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patent: 5140279 (1992-08-01), Scott, III
patent: 5245344 (1993-09-01), Sooch
patent: 5376936 (1994-12-01), Kerth et al.
Gray, Paul R., et al., "Analysis and Design of Analog Integrated Circuits", University of California, Berkeley, pp. 253-267.
Horowitz, Paul et al., "The Art of Electronics", Cambridge University Press, pp. 266-267.
Kasha Dan B.
Sooch Navdeep S.
Callahan Timothy P.
Crystal Semiconductor
Koestner Ken J.
Le Dinh
Violette J. P.
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