US 12,449,462 B2
Drive sense circuit with transient suppression
Phuong Huynh, Fairfax, VA (US); and Patrick Troy Gray, Cedar Park, TX (US)
Assigned to SigmaSense, LLC., Austin, TX (US)
Filed by SigmaSense, LLC., Wilmington, DE (US)
Filed on Feb. 25, 2021, as Appl. No. 17/249,260.
Application 17/249,260 is a continuation of application No. 16/195,349, filed on Nov. 19, 2018, granted, now 10,935,585.
Prior Publication US 2021/0181247 A1, Jun. 17, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G01R 29/26 (2006.01); G01R 31/40 (2020.01); H03F 3/45 (2006.01); H03K 5/1252 (2006.01); H03K 5/24 (2006.01); H03K 5/00 (2006.01); H03M 1/12 (2006.01); H03M 1/66 (2006.01)
CPC G01R 29/26 (2013.01) [G01R 31/40 (2013.01); H03F 3/45475 (2013.01); H03K 5/1252 (2013.01); H03K 5/24 (2013.01); H03F 2200/129 (2013.01); H03F 2203/45116 (2013.01); H03K 2005/00078 (2013.01); H03M 1/12 (2013.01); H03M 1/66 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method comprises:
providing, by a signal source circuit of a sensing circuit, a signal to a sensor via a conductor, wherein, when the sensor is exposed to a condition and is receiving the signal, an electrical characteristic of the sensor affects the signal, wherein the signal includes at least one of: a direct current (DC) component and an oscillating component, wherein, when the sensing circuit is in a noisy environment, transient noise couples with the signal to produce a noisy signal;
comparing, by a transient circuit of the sensing circuit, the noisy signal with a representation of the noisy signal; and
when the noisy signal compares unfavorably with the representation of the noisy signal, supplying, by the transient circuit, a compensation signal to the conductor, wherein a level of the compensation signal corresponds to a level at which the noisy signal compares unfavorably with the representation of the noisy signal.