Abstract: A circuit, method, and system including the circuit such that the circuit is for a passive radio-identification tag operating in a UHF band and is configured for radio communication with a reader which sends a periodic read signal. A period of the read signal includes an energy recovery phase and a communication phase. The circuit has: a control device configured to accumulate an energy reserve from the radio wave during the energy recovery phase and to communicate with the reader during the communication phase, an interface to connect an external analog sensor. The interface includes: an electrical connection configured to connect and supply the external analog sensor with electricity and to acquire the analog measurement from the sensor, an amplifier configured to amplify the signal of the analog measurement from the sensor, and an analog-digital converter configured to digitize the amplified analog measurement from the sensor.

Abstract: An electronic circuit, comprising at least an analog part, subjected to predefined input signals in the time domain, is broken down into at least one modeled elementary block. The input signal is transformed into a simulation signal which comprises at least one useful signal component representative of the spectral power density of the input signal. Application to an input of the simulation signal circuit is simulated. The useful component of the simulated signal is computed on output of each successive block. The useful component of the simulated signal output from the circuit is compared with at least one predefined signal to test at least one characteristic of the circuit. A noise component can be introduced in a simulation signal or in the output signal of a block passed through.