Radio frequency signal power amplification circuit
US9496827B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 2015 |
| Grant date | Nov 15, 2016 |
| Priority date | — |
| Expiry date | Dec 2, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/21103
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An RF amplifier includes a branch with an inductor series-connected with a capacitor between first and second power supply nodes, a junction point between the inductor and capacitor forming an output node. A further branch includes a MOS transistor series-connected with a switch between the output node and the second power supply node. The switch has a control node coupled to receive a first input signal. The MOS transistor has a gate coupled to receive a second input signal. A control circuit applies the power supply voltage as the second input signal when a frequency/phase-modulated signal is applied as the first input signal. The control circuit further applies a variable signal as the second input signal when a radio frequency signal of constant frequency, phase, and amplitude is applied as the first input signal, and in this mode the MOS transistor is constrained to operate as a current source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.