CONTROLLING IMPEDANCE OF A SWITCH USING HIGH IMPEDANCE VOLTAGE SOURCES TO PROVIDE MORE EFFICIENT CLOCKING

摘要

The clock system of the integrated circuit includes first and second (502) and second (504) transistors forming a switch that is used to switch the clock system Clk between the resonant mode and the non-resonant mode of operation. The inductor forms a resonant circuit with the capacitance of the clock system in the resonant mode. The switch receives the clock signal Clk and provides a clock signal to the inductor when the switch is closed and disconnects the inductor from the clock system when the switch is open. The first 501 and second 503 high impedance voltage sources supply respective first and second voltages to the switch and the gate voltage of the first transistor transitions to a clock signal around the first voltage and the gate of the second transistor The voltage transitions to the clock signal around the second voltage so that the quasi-constant overdrive voltage is maintained for the first and second transistors.