Passive mixer power detector method and apparatus
US7786720B2 · kind B2 · utility
3Cited by
6References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 26, 2008 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | Feb 22, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The power level of an RF signal is detected using a circuit having relatively low DC offset, high dynamic range, small frequency and temperature dependence and low flicker noise. According to one embodiment, the power detector circuit comprises a chain of amplifiers and a passive mixer. The chain of amplifiers converts the RF input signal to a supply-limited RF square wave signal. The passive mixer passively mixes the supply-limited RF square wave signal with the RF input signal and in response generates a rectified output signal that tracks the amplitude of the RF input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.