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Attenuators Circuits

 

Last Updated: November 30, 2017 07:38 AM


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

2 & 5W Attenuators cover DC-18GHz -  AN-70-002 Application Note __ MiniCircuits.com

A Precision Audio Attenuator using the MAX502 -  App Note/ 1844 / Sep-03 __ Maxim Integrated

Active Attenuator -  This active attenuator works as a simple mixer.  A signal from a 1 MHz oscillator is mixed with the received signal in a 1N914 diode.  The 1000 ohm potentiometer adjusts the level of the local oscillator fed to the mixer diode.  It is possible to get over 100 db attenuation using this device.  This circuit is a variation of one first described in the November, 1992 issue of QST.  That circuit was designed by PA0ZR.  It used a L/C tuned 500 KHz oscillator. __ Contact: Joe Leggio WB2HOL

AN-70-001  Fixed attenuators help minimize impedance mismatches -  AN-70-001 Application Note __ MiniCircuits.com

AN-70-002  2&5W Attenuators cover DC-18GHz -  AN-70-002 Application Note __ MiniCircuits.com

AN-70-004  Digital Step Attenuators offer Precision & Linearity -  AN-70-004 Application Note __ MiniCircuits.com

Attenuators Nullify Temperature Deviations -  08/17/98 EDN-Design Ideas NOTE :  File has several circuits, scroll to this one.  You can use the circuits in Figure 1 to temperature-compensate a dc voltage of any circuit if the voltage-versus-temperature curve meets the following criteria:   The curve is stable in time at the same temperature;  The curve is reproducible under repeated temperature cycling;  The curve is monotonic within the necessary after-compensation accuracy   (in other words, the curve doesn't have local fluctuations that exceed the maximum-allowable after-compensation flatness); __ Circuit Design by Semyon Lapushin, Electronic System Products, A Division of Antec, Norcross, GA

Digital Step Attenuators offer Precision & Linearity -  AN-70-004 Application Note __ MiniCircuits.com

Digital Stereo Potentiometer -  in PDF format, text in Finnish

Electronic attenuator -  Two low voltage, low power zeners are used to control electronically the level of an audio signal.  The attenuation range is from 6 to 58dB for an input current from 0.042 to 77mA corresponding to a control voltage from 2.7 to 7.5V.  If control voltage is limited to 5V, the attenuation is around 30dB at a control current of 2mA.  This is not an HiFi attenuator but might come useful as a general purpose audio attenuator

Fixed and variable RF attenuators -  Ham RadioSchematic __ Designed by Guy Roels ON6MU

Fixed attenuators help minimize impedance mismatches -  AN-70-001 Application Note __ MiniCircuits.com

Input Attenuator for the Digital Audio Millivoltmeter -  If you'd like to be able to use our Digital Audio Millivoltmeter to measure AC voltages up to 140V RMS, this add-on project is the answer.  It's a simple switched input divider which lets you add 40dB, 20dB or 0dB of attenuation ahead of the meter at the touch of a knob. __ SiliconChip

Introduction, Definition of terms, Q&As-att6-1 -  Application Note __ MiniCircuits.com

Op Amp linearizes attenuator control response -  07/25/02 EDN-Design Ideas Professional-audio equipment commonly uses Analog Devices'(www.analog.com] high-performance, quad-voltage-controlled SSM2164 attenuator.  The control response is -30 dB/V, with 0V producing unity gain.  Attenuation increases as the applied control voltage increases in the positive direction.  The circuit in Figure 1 extends the range of applications for this versatile chip by providing a simple__ Circuit Design by Mike Irwin, Shawville, PQ, Canada

Passive Attenuator -  This attenuator was the result of a search for an inexpensive attenuator which could be used on an HT to help beginners equip themselves for a hidden transmitter hunt.  The 3/8 inch piece of wire will extend into the center conductor of the bulkhead adaptor forming a small capacitor.  The coupling between the two conductors will vary as the PL-259 shell is turned further onto the bulkhead adaptor. __ Contact: Joe Leggio WB2HOL

Precision Attenuator with Digital Control -  This is a circuit for a low cost precision attenuator with digital control. __ Electronics Projects for You

Precision Audio Attenuator using the MAX502 -  App Note/ 1844 / Sep-03 __ Maxim Integrated

Precision divide-by-two analog attenuator needs no external components -  03/17/05 EDN-Design Ideas Many modern A/D converters offer only a 5V input range, and using these converters with a 65V or larger input signal gives the designer a problem  how to discard half of a good analog signal without introducing errors and distortion.  To solve the problem, you can use an attenuator comprising two operational amplifiers and two resistors(Figure 1)__ Circuit Design by Moshe Gerstanhaber and Chau Tran, Analog Devices, Wilmington, MA

Step Attenuators offer Precision & Linearity -  AN-70-004 Application Note __ MiniCircuits.com

Stereo Potentiometer -  in PDF format, text in Finnish

Variable Optical Attenuator in BER Test Applications Application Note __ Aligent


Attenuators Circuits


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