Variable PIN Attenuator


Posted on Feb 6, 2014

This is a very useful RF attenuator circuit which works from 300KHz to the 3GHz range based on the quad PIN diode array HSMP-3816 from Avego. The lower PIN diodes are biased at 1mA which gives about a 40 to 70 ohm impedance. R5 can be increased to increase the RF input and output impedances of the circuit. The upper diodes are biased by the contro


Variable PIN Attenuator
Click here to download the full size of the above Circuit.

l voltage which varies between 0 and 10V. The signal is essentially blocked when the control voltage is 0V and passes when the control voltage is high. The beauty of this circuit is that a small current can control a higher power RF waveform. Do you need help with an electronics design Daycounter provides contract electronics design services. Contact us to give you a quote on your electronics design project.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Telephone motor Controller
    Automatic telephone recording circuit
    microcontroller 12V relay circuit converted to 5V relay under uC control
    Amplifier Schematic
    PLL FM Demodulator Circuit Module
    Bldc Motor Control Kit With Ata6833/ Ata6834
    One-IC two-tones Siren
    LSB Conversion of RT321 and RT320 HF Sets
    Electronic Stethoscope
    Precision VXO for Crystal Characterization & Matching
    Atmel 89C2051 In-Circuit Programmer



    Top