Sensor circuit, sensing chip and single-line cascade sensing system

The invention discloses a sensor circuit, a sensing chip and a single-line cascade sensing system, and the sensor circuit comprises a pulse decoding module, a control module, a storage module, a sensor module and a pulse output module. Wherein the pulse decoding module is connected with an external pulse signal generating element, and the pulse decoding module is configured to decode information carried by a first pulse signal output by the pulse signal generating element to obtain decoded information; the control module is configured to perform write operation on the storage module according to decoding information, or read parameters from the storage module, or acquire sensor data from the sensor module, and send the parameters and the sensor data to the pulse output module; and the pulse output module is configured to generate a second pulse signal from the parameter or the sensor data according to the decoding information and output the second pulse signal, wherein the second pulse signal comprises inform