This commercial radio for the AM band was sold in Japan in the 1960s. The circuit has an IF of 455 kHz and is powered by batteries. The push-pull output gives a good audio power.
This circuit was found in the July 1993 issue of Radio Electronics magazine. Based on an AD532, it...
National Semiconductor suggests the figure circuit for stabilizing the peak value of an...
This circuit is from a 1995 publication; The current is obtained by dividing 1.25 by R1. The...