Amplifying circuit with bypass mode and series isolation switch
US8970296B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 18, 2014 |
| Grant date | Mar 3, 2015 |
| Priority date | — |
| Expiry date | Feb 18, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0054
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifying circuit for receiving a signal in a wireless network includes an amplifier and two switches. The amplifier includes an isolation switch having a gate connected to a control signal for activating the isolation switch transistor in a bypass mode and a source/drain connected to the input for receiving the signal and the other source/drain connected to the gate of an amplifier transistor. The amplifier also includes a bypass transistor having a gate connected to a control signal for activating the bypass transistor in a bypass mode. The bypass switch is connected in parallel with the series combination of the isolation switch and amplifier between the input and output, enabling the received signal to bypass the amplifier. In the bypass mode, the isolation switch prevents RF energy from voltage modulating the gate of the amplifier transistor gate thus reducing undesirable distortion and harmonics from the amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.