Fuse tunable, RC-generated pulse generator
US5852379A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 9, 1997 |
| Grant date | Dec 22, 1998 |
| Priority date | — |
| Expiry date | May 9, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/133
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A tunable phase generator is disclosed suitable for use in integrated circuits. The phase generator includes a delay element wherein passive resistors and conductors are employed to provide relatively constant delays despite changes in operating temperatures and voltages. The phase generator is driven by a clock signal and generates therefrom a self-resettable output signal pulse with a selectable pulse width no longer than the width of the clock signal. The variable widths are provided by varying the delays of the delay elements and adding combinational logic between respective delay elements and at the input and output of the phase generator that ensure that, in most situations, the output signal pulse is reset after a delay that is independent of the pulse width of the clock signal. Delays are lengthened by decreasing the current available to a delay element for charging the capacitors. Delays are decreased by disconnecting at least some of the capacitors so that the corresponding delay element has virtually no delay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.