Slew rate enhancement circuit via dynamic output stage for...

Details Slew rate enhancement circuit via dynamic output stage for... Slew rate enhancement circuit via dynamic output stage for...

2007-09-04

2007-09-04

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C326S087000

Reexamination Certificate

active

11562996

ABSTRACT:
A slew rate enhancement circuit for adjusting a gamma curve including a main output stage, a monitoring stage, an assistant output stage and a gamma curve generating device is provided. The main output stage also generates a first push signal and a first pull signal according to the input voltage, and thereafter the second push signal and second pull signal are level shifted by the monitoring stage. A second push signal and second pull signal will turn on or turn off the assistant output stage to decided whether to output an assistant current to the load or not. The gamma curve generating device receives the assistant current to outputs at least one gamma reference voltage for adjusting a gamma curve. Specially, the improved compact circuit does not increase static operating current for the original operational amplifier and occupy a small chip area.

REFERENCES:
patent: 6784719 (2004-08-01), Okamoto et al.

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