Abstract: An analog circuit fulfills a predetermined circuit purpose in a normal state of the analog circuit. The analog circuit has an analog input or output signal or an analog signal within the analog circuit The analog circuit is coupled to a test logic. The test logic is designed to set the analog circuit to the normal state and at least a first test state. The analog circuit comprises first components designed to perform a function of the analog circuit in accordance with the predetermined circuit purpose during normal operation. The analog circuit further comprises second components designed to enable the test logic to set switching states of the first components in the event of the at least one first test state of the analog circuit of the test logic.