Compensated impedance calibration circuit
US9236863B2 · kind B2 · utility
2Cited by
14References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2014 |
| Grant date | Jan 12, 2016 |
| Priority date | — |
| Expiry date | Oct 21, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/017545
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Aspects of the invention provide for compensating impedance calibration circuits. In one embodiment, a compensated impedance calibration circuit, includes: a variable resistor network including a tunable resistor and a fixed resistor; and an external resistance network including a target external precision resistor and a parasitic distribution resistance; wherein a resistance of the variable resistor network is proportional to a resistance of the external resistance network, such that a ratio of an output voltage of the variable resistor network to a power supply voltage is constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.