US 11,867,730 B2
Adjustable low current in a sensor network
Tomas Suchy, Brno (CZ); Miroslav Stepan, Orechov (CZ); Pavel Hartl, Brno (CZ); Marek Hustava, Bratislava (SK); and Petr Kamenicky, Brno (CZ)
Assigned to SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Scottsdale, AZ (US)
Filed by SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Phoenix, AZ (US)
Filed on Feb. 16, 2021, as Appl. No. 17/176,926.
Claims priority of provisional application 63/057,005, filed on Jul. 27, 2020.
Prior Publication US 2022/0026472 A1, Jan. 27, 2022
Int. Cl. G01R 19/00 (2006.01); H03K 5/08 (2006.01); H03K 17/082 (2006.01); G06F 1/3212 (2019.01); G06F 1/3215 (2019.01); G06F 1/3234 (2019.01); G06F 1/3287 (2019.01)
CPC G01R 19/0092 (2013.01) [G06F 1/3212 (2013.01); G06F 1/3215 (2013.01); G06F 1/3253 (2013.01); G06F 1/3287 (2013.01); H03K 5/08 (2013.01); H03K 17/0828 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A sensor device coupled to a communication interface bus, the sensor device comprising:
a current source operable to provide a supply current to an operating voltage node;
a voltage clamp coupled between the operating voltage node and a power supply terminal; and
a control circuit coupled to the voltage clamp to receive a current sense signal and coupled to the current source to provide an adjustment signal to adjust the supply current responsive to the current sense signal,
wherein the current source is coupled to a tank capacitor to charge the tank capacitor using the supply current.