Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 45,000+ electronic circuits, cross-referenced
into 500+ categories.    We have searched the web to help you find quick design ideas.
We make every effort to link to original material posted by the designer. 
Please let us if you would like us to link to or post your design.

HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches



Converters: RF (Radio Frequency)

Converters -- Main Page

Last Updated: December 31, 2017 06:47 AM


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 __ Designed by Harry Lythall-SM0VPO

50 MHz to 146 MHz Converter -  amateur radio construction projects.   __ Designed by Peter Parker

A for mains synchronization has two separate outputs for each half-period -  EDN-Design Ideas 03/22/2013    Generate independent short pulses at positive- and negative-going AC mains zero crossings.__ Circuit Design by Dusan Ponikvar

Circuit Yields Accurate Absolute Values -  07/05/01  EDN-Design Ideas The circuit in Figure 1 delivers the absolute value of the input signal with an accuracy better than 10 ppm of the full-scale range.  The circuit has low zero-crossing error.  You can use it as an asynchronous demodulator, as a source__ Circuit Design by Marco Pisani, Istituto di Metrologia G Colonnetti, Turin, Italy

CMOS inverters convert RF to digital signal -  01/05/06 EDN-Design Ideas Hex-inverter-based design suits frequencies up to180 MHz__ Circuit Design by Francis Rodes

FM Radio -  Last summer vacation, I had an opportunity to be in dad's hobby workshop and decided to have a look at my pending projects.  (I am no longer a science student but now in School of Fashion Technology for my BS Degree) I realized that I had a lot of parts in boxes that I ordered and must be utilized!! I decided to complete this FM Radio project as all that was to be done was to design a board. __ Designed by Nina Gajjar

Mains Synchronization Has Two Separate Outputs for Each Half-Period -  03/22/13  EDN-Design Ideas Generate independent short pulses at positive- and negative-going AC mains zero crossings.  Often a measurement of weak signals has to be performed in the presence of strong interference from the ac power mains.  If the interfering signal cannot be filtered out, then you can still obtain a clean result by making two consecutive measurements separated in time by an odd number of half-periods of the mains and calculating the average of the two measurements.  The interfering signals have opposite polarities in consecutive measurements, and averaging cancels them out.  If you average several consecutive pairs of measurements, the results will improve still further.  __ Circuit Design by Dusan Ponikvar

Paralleling Decreases autozero-amplifier noise by a factor of two -  06/07/07  EDN-Design Ideas By simply paralleling four amplifiers of a quad auto-zero amplifier, you can decrease output noise by a factor of two__ Circuit Design by Marián Štofka, Slovak University of Technology, Bratislava, Slovakia

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.   __

Sample/ Hold Has Zero Drop & Infinite Hold -  App Note/ 12 / Jul-08___ Maxim Integrated

Sample-And-Hold Amplifier Holds the Difference Of Two Inputs -  07/24/08  EDN-Design Ideas You can fulfill a requirement for sampling the difference of two signals in two classic ways.  You can subtract the two input signals with an instrumentation amplifier whose output connects to an input of a classic sample-and-hold amplifier .   PDF has several circuits, scroll to find this design.   __ Circuit Design by Marián Štofka, Slovak University of Technology, Bratislava, Slovakia

Self Powered Sine to Square Wave Converter -  Converts sine to square waves without a power-source Useful as a test instrument for audio purposes __ Contact: Flavio Dellepiane, fladello @ tin.it

Yield Accurate Absolute Values -  07/05/01  EDN-Design Ideas The circuit in Figure 1 delivers the absolute value of the input signal with an accuracy better than 10 ppm of the full-scale range.  The circuit has low zero-crossing error.  You can use it as an asynchronous demodulator, as a source__ Circuit Design by Marco Pisani, Istituto di Metrologia G Colonnetti, Turin, Italy


RF (Radio Frequency) Converters


HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |    Privacy Policy


Copyright  January, 1998 - December, 2017     David A. Johnson & Associates.  All Rights reserved. 


 Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.