US 12,328,066 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 Apr. 14, 2023, as Appl. No. 18/300,740.
Application 18/300,740 is a continuation of application No. 17/664,851, filed on May 24, 2022, granted, now 11,658,568.
Application 17/664,851 is a continuation of application No. 17/247,886, filed on Dec. 29, 2020, granted, now 11,374,491, issued on Jun. 28, 2022.
Claims priority of provisional application 62/958,890, filed on Jan. 9, 2020.
Prior Publication US 2023/0283178 A1, Sep. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H02M 3/07 (2006.01); H01L 23/498 (2006.01); H03F 3/20 (2006.01); H04B 1/38 (2015.01); H04W 84/04 (2009.01)
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 discharging switches connected in series between a second end of the switched capacitor and the charge pump output terminal, and a pair of charging switches connected in series between the second end of the switched capacitor and a reference voltage, one charging switch of the pair of charging switches open and the other charging switch of the pair of charging switches closed during a transition from a charging operation to a discharging operation.