Found in a 90s R-E Experimenters Handbook, this circuit amplifies signals from 100 Hz to 3 MHz. The circuit has a gain of approximately 30 dB. Bipolar transistors are general-purpose types.
This receiver uses only one transistor but has excellent sensitivity to the mid-wave range. The...
This six-decade logarithmic current amplifier was found in a 2005 Linear Technology manual. The...
This 3V-only circuit was found in old American documentation, but can be implemented with...