OUTPUT SIGNAL DRIVING CIRCUIT AND METHOD THEREOF
First Claim
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1. An output signal driving circuit, comprising:
- a comparator, coupled to a reference voltage, for comparing the reference voltage and a voltage level of an output terminal to output a comparison signal;
a first switch, having a terminal coupled to a first supply voltage, and having another terminal coupled to an output terminal, wherein the conductivity of the first switch depends on a first input signal and the comparison signal, for selectively conducting the first supply voltage to the output terminal; and
a second switch, having a terminal coupled to the output terminal and having another terminal coupled to a second supply voltage wherein the conductivity of the second switch depends on a second input signal, for selectively conducting the second supply voltage to the output terminal;
wherein the first supply voltage is not less than the reference voltage.
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Abstract
The present invention provides an output signal driving circuit, which includes: a comparator coupled to a reference voltage for comparing the reference voltage and a voltage level of an output terminal to output a comparison signal; a first switch having a terminal coupled to a first supply voltage and having another terminal coupled to an output terminal, wherein the conductivity of the first switch depends on a first input signal and the comparison signal, for selectively conducting the second supply voltage to the output terminal; wherein the first supply voltage is not less than the reference voltage.
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Citations
18 Claims
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1. An output signal driving circuit, comprising:
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a comparator, coupled to a reference voltage, for comparing the reference voltage and a voltage level of an output terminal to output a comparison signal; a first switch, having a terminal coupled to a first supply voltage, and having another terminal coupled to an output terminal, wherein the conductivity of the first switch depends on a first input signal and the comparison signal, for selectively conducting the first supply voltage to the output terminal; and a second switch, having a terminal coupled to the output terminal and having another terminal coupled to a second supply voltage wherein the conductivity of the second switch depends on a second input signal, for selectively conducting the second supply voltage to the output terminal; wherein the first supply voltage is not less than the reference voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An output signal driving method, comprising:
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(a) comparing a reference voltage and a voltage level of an output terminal to output a comparison signal; (b) selectively conducting a first supply voltage to the output terminal according to a first input signal and the comparison signal; and (c) selectively conducting a second supply voltage to the output terminal according to a second input signal; wherein the first supply voltage is not less than the reference voltage. - View Dependent Claims (15, 16, 17, 18)
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Specification