- Published in issue 7/1991 on page 70
50 Hz band-stop filter
Motorola's Type TLC2201 low-noise precision opamp is probably not the best-known amplifier made in LinCMOS technology, but it is certainly a very interesting and useful device. Apart from a noise figure of 18 nV (Hz-1), which is low for opamps, the chip also has very good d.c, characteristics. The JFET inputs have an offset of only 100 µV, while the temperature coefficient is 0.5 µV K^-1. Until not so long ago, such specifications were possible only in amplifiers with bipolar inputs.