Complex switch control system
First Claim
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1. A complex switch control system, comprising:
- a plurality of switches;
a switching voltage control circuit for converting an operating voltage into a switching voltage according to states of the switches; and
a comparator for comparing the switching voltage with a reference voltage and outputting a switch state signal to a keyboard controller,wherein the duty cycle of the switch state signal corresponds to the states of the switches.
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Abstract
A complex switch control system including many switches, a switching voltage control circuit and a comparator is provided. The switching voltage control circuit converts an operating voltage into a switching voltage according to the states of the switches. The comparator compares the switching voltage with a reference voltage and outputs a switch state signal to a keyboard controller. A duty cycle of the switch state signal corresponds to the states of the switches.
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Citations
8 Claims
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1. A complex switch control system, comprising:
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a plurality of switches; a switching voltage control circuit for converting an operating voltage into a switching voltage according to states of the switches; and a comparator for comparing the switching voltage with a reference voltage and outputting a switch state signal to a keyboard controller, wherein the duty cycle of the switch state signal corresponds to the states of the switches. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification