2304 and 3456 MHz Power Amplifiers

4 -Transistor Tracking Transmitter

40 MHz Wideband RF Amplifier

No tuned elements. Does not use in resonant circuits

7.8MHz I.F. Amplifier

Primary winding has 18 turns, the secondary winding has 4 turns. The capacitors across the IFT primaries are 82pF. The -6db bandwidth is about 2.5KHz.

Amplifier Thermal Protection and Shutdown Circuit

Car amplifier information and schematics

Car tube pre amplifier

Difference Amplifier uses Digital Potentiometers

You sometimes need to measure a small signal in the presence of a large common-mode signal. Traditional instrumentation amplifiers that use two or three op amps in their internal structure find common use in these applications.

Differential Amp Needs No Power Source

A true-differential, power-source-free, high-input-impedance amplifier with bipolar output would present distinct advantages in remote devices. Such an amplifier, with its bipolar output, would be a better choice than a unipolar,4- to20-mA device.

Fully Differential Input Voltage Amplifier

National Semiconductor Application Notes.