Invention Grant
- Patent Title: Delay inversely proportional to temperature timer circuit
- Patent Title (中): 延迟与温度定时器电路成反比
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Application No.: US10802977Application Date: 2004-03-16
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Publication No.: US07642833B1Publication Date: 2010-01-05
- Inventor: Chris Smith , Dave Chapman , Tim Fiscus
- Applicant: Chris Smith , Dave Chapman , Tim Fiscus
- Applicant Address: US CA San Jose
- Assignee: Cypress Semiconductor Corporation
- Current Assignee: Cypress Semiconductor Corporation
- Current Assignee Address: US CA San Jose
- Main IPC: H03H11/26
- IPC: H03H11/26

Abstract:
A timer circuit is disclosed. The timer, having a delay configured to track inversely with temperature of the memory device, includes a reference signal configured to increase in voltage, as the temperature of the memory device increases. The reference signal may be generated from a current that is derived from a bandgap reference circuit. The timer circuit includes a pull-down path made up of a plurality of selectable pull down transistors which are coupled to the reference signal at the gate. Resistance of the pull-down path is reduced as the reference signal is increased and the reduced resistance of the pull-down path decreases the delay of timer. A plurality of selectable delay elements may be preconfigured to adjust the delay and are coupled to the output path of the current starved inverter.
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