Patent ID: 11899485
Assignee: SIGMASTAR TECHNOLOGY LTD.
Field: Control (Instruments)
Classification: CPC G  H | IPC G  H

Claim 4:
5. The line driver according to claim 4, wherein one of the second current paths comprises:
a third P-type transistor, receiving the power supply voltage;
a first switch, selectively turned on according to a corresponding one among the first bits, so as to provide the power supply voltage to turn off the third P-type transistor;
a second switch, selectively turned on according to a corresponding one among the second bits, so as to provide the first signal to bias the third P-type transistor;
a fourth P-type transistor, biased by the first reference voltage, and coupled between the third P-type transistor and the output terminal;
a third N-type transistor, biased by the second reference voltage, and coupled to the output terminal;
a fourth N-type transistor, coupled between the third N-type transistor and the ground;
a third switch, selectively turned on according to a corresponding one among the third bits, so as to provide a ground voltage to turn off the fourth N-type transistor; and
a fourth switch, selectively turned on according to a corresponding one among the fourth bits, so as to provide the second signal to bias the fourth N-type transistor.