US 12,476,628 B2
Constant current output circuit configured for micro-current and micro-current shower head
Boren Chen, Fujian (CN); Shuangjiu Wang, Fujian (CN); Jianan Li, Fujian (CN); and Lian Zhang, Fujian (CN)
Assigned to Xiamen Solex High-Tech Industries Co., Ltd., Xiamen (CN)
Filed by Xiamen Solex High-Tech Industries Co., Ltd., Fujian (CN)
Filed on Feb. 22, 2023, as Appl. No. 18/112,727.
Claims priority of application No. 202210191649.0 (CN), filed on Feb. 28, 2022.
Prior Publication US 2023/0275574 A1, Aug. 31, 2023
Int. Cl. H03K 17/06 (2006.01); H03K 19/00 (2006.01)
CPC H03K 17/063 (2013.01) [H03K 19/0016 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A constant current output circuit configured for a micro-current, comprising:
a voltage boosting module,
a logic controller, and
a resistance access detection module, wherein:
an input terminal of the voltage boosting module is connected to a power source,
an output terminal of the logic controller is connected to the input terminal of the voltage boosting module,
the logic controller is configured to compare a sample voltage generated by the micro-current on a sampling resistor with a first threshold voltage,
when the sample voltage is less than the first threshold voltage, the logic controller drives the voltage boosting module to boost an output voltage until the sample voltage is increased to be greater than the first threshold voltage,
the logic controller comprises a first comparator,
the resistance access detection module comprises a second comparator, and
each of an output terminal of the first comparator and an output terminal of the second comparator is connected to an OR gate.