Compensated impedance calibration circuit
US9270268B2 · kind B2 · utility
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14References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 2, 2013 |
| Grant date | Feb 23, 2016 |
| Priority date | — |
| Expiry date | Jan 3, 2033 |
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.