Amorphous, thin film transistor driver/receiver circuit with hysteresis
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United States of America Patent
Stats
-
Oct 31, 1995
Issued Date -
N/A
app pub date -
Jun 16, 1994
filing date -
Dec 29, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A driver circuit has hysteresis. The driver circuit includes a comparator circuit having first and second inputs and an output. The driver circuit also includes a variable voltage divider circuit coupled between the second input and the output of said comparator. The voltage divider circuit provides a first voltage to the second input of the comparator when the output of the comparator is at a second voltage, and a third voltage to the second input of the comparator when the output of the comparator is at a fourth voltage. Therefore, the output voltage of the comparator switches from the second to the fourth voltage when the voltage of a signal at the first input of the comparator rises above the first voltage, and the output voltage of the comparator switches from the fourth to the second voltage when the voltage of the signal at the first input of the comparator falls below the third voltage.
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