Abstract
The sympathetic nervous signal sensing system includes an electrode pair, a high input impedance receiving circuit, a differential circuit, and a post-processing circuit. The electrode pair is arranged on a subject and includes a first electrode configured to receive a first signal and a second electrode configured to receive a second signal. The high input impedance receiving circuit includes a first follower configured to receive a first signal and output a third signal, and a second follower configured to receive a second signal and output a fourth signal. The differential circuit is configured to perform a differential processing on the third signal and the fourth signal to generate a fifth signal. The post-processing circuit is configured to filter the fifth signal according to a first filtering frequency band to output a sympathetic nervous signal.