Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1998-09-29
2000-11-14
Shalwala, Bipin
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345204, 3151693, G09G 322
Patent
active
06147665&
ABSTRACT:
The present invention provides for an amplifier circuit for use within a column driver of a field emission display (FED) device. In one embodiment of the present invention, the amplifier circuit has a high slew rate and a low quiescent current, and includes: an input for receiving an input voltage signal, an output for providing an output voltage signal, a voltage sensing circuit for monitoring a voltage differential between the input voltage signal and the output voltage signal, and a current-boosting circuit responsive to the voltage differential for providing additional bias current to the voltage sensing circuit to increase the slew rate of the output voltage signal. Significantly, the current-boosting circuit is inactive when the input voltage signal and the output voltage signal are substantially equivalent. In this way, bias current and power dissipation are maintained at a low level during quiescent conditions. In furtherance of the present embodiment, the input of the amplifier circuit is configured for coupling to D/A conversion circuits of the column driver to receive the input voltage signal, and the output of the amplifier circuit is configured for coupling to a column line of the FED to drive the output voltage over the column line.
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Sendra and Smith. Microelectronic Circuits. Oxford University Press, 4th edition, 1997. pp. 839-848.
Candescent Technologies Corporation
Osorio Ricardo
Shalwala Bipin
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