Transformer based impedance matching network and related power amplifier, ADPLL and transmitter based thereon
US9831847B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 2017 |
| Grant date | Nov 28, 2017 |
| Priority date | — |
| Expiry date | May 2, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/427
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A novel and useful transmitter (TX) architecture for ultra-low power (ULP) radios. An all-digital PLL employs a digitally controlled oscillator (DCO) having switching current sources to reduce supply voltage and power consumption without sacrificing phase noise and startup margins. It also reduces 1/f noise allowing the ADPLL after settling to reduce its sampling rate or shut it off entirely during direct DCO data modulation. A switching power amplifier integrates its matching network while operating in class-E/F2 to maximally enhance its efficiency. The transmitter has been realized in 28 nm CMOS and satisfies all metal density and other manufacturing rules. It consumes 3.6 mW/5.5 mW while delivering 0 dBm/3 dBm RF power in Bluetooth Low-Energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.