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Converters: RF (Radio Frequency)
Converters -- Main Page
Last Updated on:
Thursday, April 07, 2016 01:00 PM

Circuits Designed by Dave Johnson, P.E. :
  • Wide Band Zero Cross Detector  -  This circuit was designed to convert a low Amplitude 40KHz signal into a clean square wave signal. It will work with inputs as small as 5mv peak-to-peak or as large as 3 volts peak to peak. The input frequency can range from a few kilohertz to about 150 . . . [Circuit by David Johnson P.E.,  02/18/06]
  • Zero-Cross Detector-Wide Band  -  This circuit was designed to convert a low Amplitude 40KHz signal into a clean square wave signal. It will work with inputs as small as 5mv peak-to-peak or as large as 3 volts peak to peak. The input frequency can range from a few kilohertz to about 152 . . . [Hobby Circuit designed by Dave Johnson P.E.,  02/18/06]

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

2m-20m Transverter  -  This little circuit is a transmitting and receiving converter (transverter) that converts a FT290 or similar multimode handheld transciever to the 14MHz amateur band. The project is a single board module that needs an external local oscillator, for example, the VHF harmonic oscillator (or QRP VHF FM TX) LO for transverter project. It should be a relatively simple matter of scaling coils. . .  [from Harry Lythall's website]

50 MHz to 146 MHz Converter  -  amateur radio construction projects. . . .  [from Peter Parker's website]

CMOS inverters convert RF to digital signal  -  01/05/06 EDN Design Idea   Hex-inverter-based design suits frequencies up to180 MHz. . . .  [by Francis Rodes]
Low Distorition RF FM Generation & Detection Using Hyper-Abrupt Tuning Diodes  -  MicroNote 706. . .  [Microsemi Corp]

Receiving Converters 88-108 Mc to AM Broadcast band  -  I designed this circuit.   It can be connected to an FM tuner to play FM stations on an AM radio. . . .  

RF Frequency Linear Tuning Varactors  -  MicroNote 705. . .  [Microsemi Corp]

Wide Band Zero Cross Detector  -  This circuit was designed to convert a low Amplitude 40KHz signal into a clean square wave signal. It will work with inputs as small as 5mv peak-to-peak or as large as 3 volts peak to peak. The input frequency can range from a few kilohertz to about 150 . . . [Circuit by David Johnson P.E.,  02/18/06]

Zero-Cross Detector-Wide Band  -  This circuit was designed to convert a low Amplitude 40KHz signal into a clean square wave signal. It will work with inputs as small as 5mv peak-to-peak or as large as 3 volts peak to peak. The input frequency can range from a few kilohertz to about 152 . . . [Hobby Circuit designed by Dave Johnson P.E.,  02/18/06]

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