Posted on Sep 21, 2012

This rf probe is coupled with a fiber-optiCJ:able to the test equipment. It utilizes inexpensive components to improve probe performance at UHF frequencies. The receiving antenna in this probe feeds an envelope-detector diode. After amplification by the LF356 op amp, the low-frequency output modulates the LED, which in tum feeds the optical fiber.

Click here to download the full size of the above Circuit.

The design facilitates the use of a single battery for the op amp, with voltage splitting by means of the 1-K!l potentiometer, and miniature 47-I"F tantalum capacitors to provide decoupling. The gain control is easily adjusted to give the best dynamic range for a specific LED.

Leave Comment

characters left:

New Circuits



Popular Circuits

6Meter kilowatt amplifier
Tone ringer
Tone control
The Digital Sketchbook Arduino Frequency Measurement Library
20 Watts Car Stereo Amplifier Using TDA2004
Groovewatt a DIY Vacuum Tube (Valve) RIAA Phono Preamplifier Project
Generate Dual Voltages That Track By Percentage Of Range
PS10 Quad Power Sequencing Controller - Supertex Inc
PWM Generator
Direct Coupled Discrete Astable Multivibrator circuit