Period signal generation circuits
First Claim
1. A period signal generation circuit, the circuit comprising:
- a drive voltage generator configured to select one of plurality of temperature-dependent voltages to output the selected temperature-dependent voltage as a drive voltage;
a discharger configured to discharge charges of an internal node;
a level detector configured to compare an internal signal induced at the internal node with a reference voltage to determine a logic level of a periodic signal; and
a driver configured to drive a level of the internal node to the drive voltage in response to the periodic signal wherein the plurality of temperature-dependent voltages comprise first to third temperature-dependent voltages, a level of the first temperature-dependent voltage increases as the temperature rises and a level of the second temperature-dependent voltage decreases as the temperature rises.
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Accused Products
Abstract
A period signal generation circuit including a control voltage generator and a period controller. The control voltage generator selecting one of temperature-dependent voltages to output the selected temperature-dependent voltage as a control voltage. The first and second temperature-dependent voltages varying according to a temperature and the third temperature-dependent voltage is constant regardless of variation of the temperature. The period controller configured to determine an amount of a current discharging from an internal node in response to the control voltage and outputs a periodic signal whose cycle time is determined according to a level of an internal signal induced at the internal node.
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Citations
8 Claims
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1. A period signal generation circuit, the circuit comprising:
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a drive voltage generator configured to select one of plurality of temperature-dependent voltages to output the selected temperature-dependent voltage as a drive voltage; a discharger configured to discharge charges of an internal node; a level detector configured to compare an internal signal induced at the internal node with a reference voltage to determine a logic level of a periodic signal; and a driver configured to drive a level of the internal node to the drive voltage in response to the periodic signal wherein the plurality of temperature-dependent voltages comprise first to third temperature-dependent voltages, a level of the first temperature-dependent voltage increases as the temperature rises and a level of the second temperature-dependent voltage decreases as the temperature rises. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification