Extension of the Test System for Middle-Resolution Digitisers up to 20 MHz

摘要

The system for testing of digitisers at the frequency of input signal of 1 MHz designed and manufactured at the Dept. of Measurement in the last years was extended for the frequencies up to 20 MHz. Sets of common LC filters (both band pass and band stop) for frequencies 4.4, 9.5 and 19.5 MHz were developed. First experiments showed that these low-cost LC filters based on coils with ferromagnetic cores are sufficient for direct testing of digitisers with ENOB < 14 at a frequency of the test signal up to 10 MHz and for digitisers with ENOB < 12 up to 20 MHz.