Patent · US Active

Analog switch for RF front end

US9128502B2 · kind B2 · utility

0Cited by

8References

19Claims

0Family size

Assignee

QUALCOMM Incorporated · US

Inventors

James Francis Imbornone · Methuen, US
Xinwei Wang · Dunstable, US
Zhenying Luo · Westford, US
Xiangdong Zhang · Weifang, CN

Key dates

Filing date	Aug 7, 2013
Grant date	Sep 8, 2015
Priority date	—
Expiry date	Aug 16, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH03K2217/0054
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

Techniques for improving the linearity of radio-frequency (RF) front-end switches. In an aspect, open-loop techniques are disclosed for superimposing the output voltage of one or more negative rectifiers on a negative substrate bias voltage to reduce the non-linearities associated with voltage-dependent substrate leakage current. In another aspect, closed-loop techniques are further disclosed for maintaining the substrate bias voltage close to a reference voltage. Exemplary embodiments of the circuit blocks are further described.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.