Off-chip process, voltage, temperature, compensation resistor sharing
US6281687A · kind A · utility
5Cited by
29References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 9, 1999 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Jun 9, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/00384
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A process, voltage, and temperature calibration system that shares a single calibration resistor among multiple calibration circuits. The use of single calibration resistor among several calibration circuits is accomplished through time division multiplexing. N-channel and P-channel field effect transistor calibration also share the same resistor. Turning on transistors in calibration circuits of the type not being calibrated creates a low impedance path from one terminal of the calibration resistor to a power supply. This biases the calibration resistor for the calibration circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.