| 摘要 |
<p>A tracking ROM drive and sense circuit for driving a ROM having a ROM input terminal and a ROM output terminal, the tracking ROM drive and sense circuit comprising: a sense amplifier means having an input terminal coupled to the ROM output terminal, the sense amplifier means providing an output signal at a sense amplifier means output terminal in response to a ROM output signal voltage at the sense amplifier input terminal penetrating a predetermined sense amplifier threshold voltage, the sense amplifier means output signal being adapted to change from a first to a second logic level in response to the sense amplifier means threshold voltage penetration, the sense amplifier means threshold voltage being further adapted to change in a temperature dependent, voltage source and process dependent relation; a drive circuit, the drive circuit having an output terminal coupled to the ROM input terminal, the drive circuit being further adapted to provide the drive voltage at the drive circuit output terminal, the drive voltage being adapted to change in a sense amplifier means threshold voltage temperature dependent, voltage source dependent and process dependent change accommodating relation; whereby the ROM being responsive to the drive voltage, adapts the ROM output signal first and second logic level voltage range to accommodate the sense amplifier means temperature dependent threshold voltage change, thereby improving sense amplifier means ROM output signal logic level detecting margin.</p> |
