Integrated circuit with actuation circuit for actuating a driver circuit

摘要

An integrated circuit includes a terminal supplying a digital signal, a controllable driver circuit connected to the terminal and outputting the digital signal, and a comparator device. An actuating circuit actuates the driver circuit as a function of a clock signal. The comparator device compares the timing of signal transitions of the clock signal with transitions of the digital signal. The comparator has a first comparator input for receiving the clock signal and a second comparator input connected to the driver output for receiving the digital signal. The comparator device outputs an output signal having a first state if a signal transition of the clock signal at the first input takes place before a signal transition of the digital signal at the second input, and outputs a second state if the clock signal transition takes place after digital signal transition. In a test mode, the invention compares the clock and digital signal timings with a high degree of accuracy.