US 12,456,975 B2
Voltage supply switch interlock logic
Gary Chunshien Wu, San Diego, CA (US); and Gregory Szczeszynski, Nashua, NH (US)
Assigned to pSemi Corporation, San Diego, CA (US)
Filed by pSemi Corporation, San Diego, CA (US)
Filed on May 15, 2024, as Appl. No. 18/664,635.
Claims priority of provisional application 63/504,337, filed on May 25, 2023.
Prior Publication US 2024/0396544 A1, Nov. 28, 2024
Int. Cl. H03K 17/30 (2006.01); H03K 19/0185 (2006.01); H03K 19/0948 (2006.01)
CPC H03K 17/302 (2013.01) [H03K 19/018521 (2013.01); H03K 19/0948 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electronic switch, including:
(a) a first through-path coupled between a first input terminal and an output terminal, and a first shunt-path coupled between the first through-path and a reference potential;
(b) a second through-path coupled between a second input terminal and the output terminal, and a second shunt-path coupled between the second through-path and a reference potential;
(c) a first monitor logic block coupled to respective control inputs of the first through-path, the first shunt-path, and the second shunt path, the first monitor logic block responsive to a first combination of a first control signal and a second control signal;
(d) a second monitor logic block coupled to respective control inputs of the second through-path, the second shunt-path, and the first shunt path, the second monitor logic block responsive to a second combination of the first control signal and the second control signal;
wherein the first monitor logic block and the second monitor logic block are configured such that the first through-path is turned OFF before the first shunt-path is allowed to turn ON and before the second shunt-path is allowed to turn OFF, and the second shunt-path is turned OFF before the second through-path is allowed to turn ON; and
wherein the first monitor logic block and the second monitor logic block are configured such that the second through-path is turned OFF before the second shunt-path is allowed to turn ON and before the first shunt-path is allowed to turn OFF, and the first shunt-path is turned OFF before the first through-path is allowed to turn ON.