| 摘要 |
A circuit configuration for the identification of integrated semiconductor circuitries includes n programmable elements. A common line is connected to the programmable elements. An n-stage serial-parallel shift register has a data input, n parallel outputs, and a clock input for controlling a shift function of the serial-parallel shift register as a function of a clock signal to be applied to the clock input. Transistors each have a drain connected to a respective one of the programmable elements, a source connected to a supply potential, and a gate connected to a respective one of the parallel outputs of the serial-parallel shift register. Instead of n-stage serial-parallel shift register, it is also possible to use a clocked n-stage oscillator, such as a ring oscillator, or an n-stage counter, such as ring counter.
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