Based on an LM36000 OTA this circuit was found in the July 1988 issue of Radio Electronics magazine. It covers frequencies in the range of 45 Hz to 45 kHz.
With this circuit it is possible to tune the signals in the 50 MHz band in a common AM receiver around...
This circuit is from a 1980 publication. The circuit has high gain with weak signals and lower gain...
The original document is from Philiups, but now available from NXP (www.nxp.com), which is the...