Converters - Frequency Electronic Circuits

Converters: Frequency Circuits
Converters -- Main Page
Last Updated on: Monday, October 03, 2011 06:07 PM

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

750 MHz Power Doubler & Push-Pull CATV Hybird Modules Using Gallium Arsenide 3/21/96 - Application Note California Eastern Laboratories Doc #920 (app note added 6/06)

900MHz Down Converter Consumes Little Power - 06/22/95 EDN-Design Ideas Most 900-MHz down-converter designs are proprietary and, thus, are unavailable to the industry. The designs that are available are usually discrete or require high voltage, which excludes them from the portable market. The down converter in Fig 1 is nonproprietary and suits battery-powered applications. Moreover, you can use the IC.... [Design Idea by Ronald Mancini and Raphael Matarazzo, Harris Semiconductor, Melbourne, FL]

Charge Pump Doubles Negative Voltage - Maxim Application Note #782 (app note added 5/08)

Delay Line implements Clock Doubler - 07/18/96 EDN-Design Ideas:....[Design Idea added 3/03] EDN is migrating links. This link is not verified. Google the "title" EDN for new link.

Diode Frequency Doublers - Ordinary fast switching silicon diodes, special fast recovery junction diodes, schottky barrier diodes, varactors and even old-fashioned germanium diodes or vacuum tubes may be used to construct signal powered frequency doublers....(electronic circuit added 7/03)

Dither a power converter's operating frequency to reduce peak emissions - 13-Oct-05 Issue of EDN Add a small circuit to spread the peak RFI energy.... [Design Idea by By Bob Bell and Grant Smith, National Semiconductor, Phoenix, AZ; Edited by Brad Thompson and Fran Granville]

Frequency Doubler Operates on Triangle Waves - 03/14/96 EDN-Design Ideas [Design Idea added 03/03/03] EDN is migrating links. This link is not verified. Google the "title" EDN for new link.

Frequency Multiplier Improves Line Readings - 03/26/98 EDN-Design Ideas Because of the low frequencies involved, accurately measuring line-frequency variations is complicated. When you use an ordinary frequency counter with a 1-sec gate time, the reading would be 59, 60, or 61 Hz. To obtain 0.01-Hz accuracy, you must increase.... [Design Idea by Yongping Xia, Teldata Inc, Los Angeles, CA]

Frequency Tripler using the Ca3028 - (electronic circuit added 7/03)

Gyrator Circuit - The gyrator principle uses the effect that the value of input capacitance at the base of a transistor is effectively multiplied by the current gain of the transistor…. [Circuit design by Andy Collison]

HCMOS Gates Make Frequency Multipliers - (electronic circuit added 7/03)

Introduction, definition of terms, Q&Asdoub9-2 - Application Note MiniCircuits.com (app note added 04/05/06)

Simple Variable Voltage Source - The high current regulator below uses an additional winding or a separate transformer to supply power for the LM317 regulator so that the pass transistors can operate closer to saturation and improve efficiency. For good efficiency the voltage at the collectors of the two parallel 2N3055 pass transistors.... (added 4/05)

Two Diode Odd-Order Multiplier - It is often necessary to multiply the frequency of low noise oscillators without significantly degrading the phase noise beyond the theoretical 20 log (N). Low noise frequency doublers constructed with Schottky signal diodes are readily available but higher-order multipliers often....(added 08/08/08)

Variable Frequency Oscillator - (electronic circuit added 10/05)