Dual voltage switch with programmable asymmetric transfer rate

Details Dual voltage switch with programmable asymmetric transfer rate Dual voltage switch with programmable asymmetric transfer rate

2005-09-13

2005-09-13

Shalwala, Bipin (Department: 2673)

Computer graphics processing and selective visual display system

Display driving control circuitry

C345S212000, C345S214000

Reexamination Certificate

active

06943786

ABSTRACT:
A dual voltage switch enables the generation of a pulse which toggles between user-provided first and second voltages (V1and V2), for which the positive and/or negative slew rates are programmable by means of a user-provided capacitance. A first switch conducts a current I1between V1and a common output node in response to a first control voltage, and a second switch conducts a current I2between V2and the common output node in response to a second control voltage. A capacitance C is connected to the common output node. A control circuit alternately provides the first and second control voltages such that the common output node is pulled up to V1at a transfer rate of I1/C when the first control voltage is provided, and pulled down to V2at a transfer rate of −I2/C when the second control voltage is provided.

REFERENCES:
patent: 5497122 (1996-03-01), Somayajula
patent: 5587722 (1996-12-01), Suzuki et al.
patent: 5831467 (1998-11-01), Leung et al.
patent: 6031248 (2000-02-01), Mei et al.
patent: 6046719 (2000-04-01), Dingwall
patent: 6618043 (2003-09-01), Washio et al.
patent: 6744417 (2004-06-01), Yamashita et al.

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