op amp IR Demodulator Design


Posted on Feb 4, 2014

Designing an IR demodulator circuit to replace the one shown in this question. Basically I want to demodulate a simple IR signal modulated at 32. 678 kHz. I just need to know if the signal is present. No packets. Just IR present or not present. I have tried simulating this in LTspice with no success so I am not sure if I`ve done something ver


op amp IR Demodulator Design
Click here to download the full size of the above Circuit.

y wrong in spice or in my circuit. I am no pro with LTspice. R1 N001 N006 2. 49K tol=1 pwr=0. 1 R2 Output N003 1Meg R3 N006 N005 1Meg C1 N005 N004 470pF C2 N003 N001 220pF C3 Output N001 220pF V1 N006 0 2. 5 V2 N002 0 5 V3 N004 0 PULSE(0. 05 0 0 0 0. 0000152587890625 0. 000030517578125 200) XU1 N005 N003 N002 0 Output LT1722. tran 12ms. lib LTC. lib. backanno. end The overall gain of the circuit is approximately 400 by my calculations. So, in choosing my op amp I would need a GBWP of 14 MHz or greater Any other critical op amp specifications for this application Note the amp showed is just a place holder until I choose the op amp.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

VHF Portable "rubber duck" antenna
FingerPrint Security circuit
A complete Inverter project
Oscillator circuits 5
2001 Civic A/C Compressor
Simple Under-Voltage Cut-Out
Single-phase double-winding motor driving
Having a differential amplifier and overcurrent protection for power supply circuit 2
Cloth from idling stop saving circuit



Top