This circuit was obtained from a Philips documentation from 1970. It can be built on modern operational amplifiers.
January 2017 - The new Texas Instruments ADS124S0x Analog-to-Digital Converters or ADCs can now be...
This circuit includes the amplifier for the signals, being fully transistorized and using varicap...
This circuit can be used with 3 receivers and is intended for low frequencies (medium wave range). We...