The invention provides a programmable delay element and a programmable slew rate element to allow post-fabrication adjustment and programming of input delay and output slew rate to iteratively alter input delay and output slew rate without redesign and refabrication of the circuit. The invention provides...http://www.google.com.hk/patents/US6239616?utm_source=gb-gplus-share專利 US6239616 - Programmable delay element
