Method and apparatus employing a process dependent impedance that compensates for manufacturing variations in a voltage controlled oscillator
US5760657A · kind A · utility
13Cited by
3References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1996 |
| Grant date | Jun 2, 1998 |
| Priority date | — |
| Expiry date | Sep 30, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/18
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A voltage controlled oscillator (VCO) having a current source and a process dependent (or process controlled) impedance is disclosed. The voltage controlled oscillator includes a current mirror that generates a reference current in response to a control current. The reference current is proportional to the control current. The process dependent impedance, which is coupled to the current mirror, compensates the reference current to account for process variations in the manufacture of the (VCO) circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.