This circuit that has a response from 10 Hz to 700 kHz was found in Philips documentation from 1968. Dual transistors can be replaced by matched pairs.
This antenna preamplifier can work with signals from about 20 MHz to 100 MHz, depending only on...
This 1 kW circuit was found in documentation from the 90s. The sensor is a thermistor, and the...
This circuit was found in an American documentation from the 90's. The circuit is intended for...