US 11,658,568 B2
Low noise charge pumps
Lui Ray Lam, Lexington, MA (US)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on May 24, 2022, as Appl. No. 17/664,851.
Application 17/664,851 is a continuation of application No. 17/247,886, filed on Dec. 29, 2020, granted, now 11,374,491.
Claims priority of provisional application 62/958,890, filed on Jan. 9, 2020.
Prior Publication US 2022/0286047 A1, Sep. 8, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H02M 3/07 (2006.01); H03F 3/20 (2006.01); H04W 84/04 (2009.01); H01L 23/498 (2006.01); H04B 1/38 (2015.01)
CPC H02M 3/07 (2013.01) [H01L 23/49811 (2013.01); H01L 23/49822 (2013.01); H02M 3/071 (2021.05); H03F 3/20 (2013.01); H03F 2200/451 (2013.01); H04B 1/38 (2013.01); H04W 84/042 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A front end system comprising:
a radio frequency switch;
a switch controller configured to bias the radio frequency switch with a charge pump voltage in a first state of a switch enable signal; and
a charge pump configured to generate the charge pump voltage at a charge pump output terminal, the charge pump including a switched capacitor, an inverter having an output electrically connected to a first end of the switched capacitor, a pair of charging switches connected between a second end of the switched capacitor and a reference voltage, and a pair of discharging switches connected between the second end of the switched capacitor and the charge pump output terminal, the pair of charging switches closed during a charging operation and open during a discharging operation, and the pair of discharging switches closed during the discharging operation and open during the charging operation.