Testers or Instruments Electronic Circuits, beginning with F-G's

Tester or Instrumentation Circuits, Page 6
Testers: #'s A-B C D E F-G H-K L M-O P Q-R S T U V-Z
Last Updated on: Friday, March 12, 2010 12:07 PM

Full wave Rectifier
Using a LF412 high speed dual op amp, this circuit will rectify any signal up to about 100KHz with a minimum amplitude of about 50mv peak to peak.

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

FAN5068 Components calculations and simulation tools / AN-6006 - Fairchild Application Notes / (app note added 6/06)

Fast settling picoammeter circuit handles wide voltage range - 09/14/06 EDN-Design Ideas: Versatile circuit converts picoamperes to millivolts.....(design idea added 9/08)

Femto Capacitance Meter - (electronic design / schematic added 2/05)

Femto Capacitance Meter - This meter measures into the low femtofarad area. Measuring in the femto area allows the smallest capacitors to be measured with precision. Such capacitors are commonly used to compensate for input and stray capacitance in amplifiers. (added 2/03) (added 5/02)

Field Strength Indicator -Analog only - (circuit schematic added 6/07)

Field Strength Meter (Andy Collinson) - This is a wide band signal strength meter circuit which responds to small changes in RF energy, designed to be used for the VHF spectrum and will respond to AM or FM modulation or just a plain carrier wave.
...(circuit added 7/02)

Field strength meter for the 137 kHz band - (diagram added 05/07)

Field Strength Meter MkI - This Field Strength Meter has been specially designed for our FM bugs. It is capable of detecting very low power transmitters and will assist enormously in peaking many of our FM transmitters that have a coil in the output stage that can be adjusted for optimum output...(schematic added 08/08/08)

Field Strength Meter MkII - This Field Strength Meter has been specially designed for our FM bugs. It is capable of detecting very low power transmitters and will assist enormously in peaking many of our FM transmitters that have a coil in the output stage that can be adjusted for optimum output...(schematic added 08/08/08)

Field-strength meter - I saw this circuit in an old issue of "73 Radio Electronics". I built it, but it didn't work well, so I changed a few components to get better sensitivity…..(design idea circuit added 09/08)

Fixed Voltage Power Supply (Aaron Cake) - The fixed voltage power supply is useful in applications where an adjustable output is not required. This supply is simple, but very flexable as the voltage it outputs is dependant only on the regulator and transformer you choose. The maximum output current is 1.5A.(electronic design added (08/08)

Four Channel Digital Voltmeter with Display and Keyboard - Microchip Application Note Published 27-May-05 (app note added 2/06)

Four Channel Oscilloscope Adapter - will introduce the adapter to see the wavefrom of four kinds of the signals at the same time with the oscilloscope on these pages. At the classy oscilloscope, it is equipped with the function to see more than one signal at the same time. The one which I am having can see only the one signal. Therefore, I made the adapter to see four kinds of the signals at the same time....(circuit / schematic design added 07/08/09)

Fox-Hound Wire tracer - Electronic circuit (Tony van Roon's electronic design added 9/04)

Free Program designs and analyzes passive and active filters - 07/07/05 EDN-Design Ideas: At one time or another, most electrical engineers encounter a requirement to design or analyze an analog filter. Despite an abundance of graphical-user-interface-based digital-filter-design tools, such as The MathWorks (www.mathworks.com)….....(design idea added 11/05)

Frequency and Capacitance Meter - ASCII format (added 4/02)

Frequency Comparator Draws 8 µA - 03/03/97 EDN-Design Ideas: (design idea added 4/05)

Frequency Comparator has Status Output - 12/26/02 EDN-Design Ideas: The original application for the circuit was to check the number of revolutions of an engine with only one LED as an indicator. The measurement of the number of revolutions usually involves sensors with a frequency output proportional to the number of revolutions.....(design idea added 3/03)

Frequency counter - This project explain a very powerful frequency counter which has many useful software functions. The software can add or subtract 3 different IF frequencies (±455 kHz ,±10.7 MHz and ±21.4 MHz). You have also two level of resolutions, 1kHz and 100Hz.....(diagram added 05/07)

Frequency Measurements using PC - (diagram added 8/03)

Frequency Meter and Pulse Generator - (schematic / circuit added 6/07)

Frequency source feeds entire lab - 01/23/03 EDN-Design Ideas: Plumbing a laboratory with a standard frequency makes a lot of sense if the lab uses multiple frequency counters, spectrum analyzers, and other frequency-dependent test equipment. Rather than spending time keeping all of the instruments' oscillators in calibration or buying expensive, high-precision oscillators, you can use the circuit in Figure 1 to distribute a single calibrated frequency sou.....(design idea added 1/05)

Frequency Window Comparator has hysteresis - 11/07/96 EDN-Design Ideas: The frequency comparator in Figure 1 uses two VCOs. C1, R1+R2, and the voltage at pin 9 determine the frequency of IC1 (900 Hz). C3, R5+R6, and the voltage at pin 9 determine the frequency of IC2 (1580 Hz). If fIN is lower than 900 Hz, then the output P2 of phase-comparator 2 in IC1 is high and drives.....(design idea added 11/05)

Frequently Asked Questions FAQs Analog Devices Energy ADE Products - AN-639 Analog Devices Application Notes (app note added 6/06)

FSM Field Strength Meter - This is a wide band signal strength meter circuit which responds to small changes in RF energy, designed to be used for the VHF spectrum and will respond to AM or FM modulation or just a plain carrier wave. (added 10/05)

Full Featured Transistor Tester - Just the thing to check the transistors for any project (electronic schematic / circuit added 4/02)

Full wave Rectifier - Using a LF412 high speed dual op amp, this circuit will rectify any signal up to about 100KHz with a minimum amplitude of about 50mv peak to peak. ….(designed by David A. Johnson)

Function generator - (electronic circuit added 05/07)

Fundamentals of RF and Microwave Power Measurements - Aligent App Note (app note added 6/07)

Fundamentals of Signal Analysis - Aligent App Note (app note added 6/07)

Gali Test Fixture Instructions - AN-60-013 Application Note MiniCircuits.com (app note added 08/08/08)

Gali-TBF Test Fixture Instructions - AN-60-015 Application Note MiniCircuits.com (app note added 08/08/08)

Gas and Water Metering with the PIC16F91X Family - Microchip Application Note Published 20-Jan-06 (app note added 6/06)

Generator 500kHz...110MHz 1 - (electronic circuit added 6/07)

Generator 500kHz...110MHz 2 - (electronic circuit added 6/07)

Get nine tips for making better resistance measurements - Agilent Application Note (app note added 6/06)

Grid Dip Meter - (schematic added 8/03)

Grid-dip-meters + xtal tester - This is a simple XTal tester circuit. T1 and XTal have formed an oscillator. C1 and C2 are voltage divider for oscillator. if the XTal is safe, the oscillator will work well and its output voltage will be rectified by C3, C4, D1 and D2, then T2 will run and LED will light. The circuit is suitable to test 100KHz, 30MHz Xtal. (electronic design added 6/07)

Grundig RV 11 VTVM schematic - (added 07/07/07)

GSM Base Station Measurements - Aligent Application Note (app note added 04/05/06)

Guide to the Design of Current Feedback Control / AN-4109 - Fairchild Application Notes / (app note added 6/06)

Testers: #'s A-B C D E F-G H-K L M-O P Q-R S T U V-Z