Temperature compensate circuit

Discussion in 'General Electronics Chat' started by Humanityrulz, Jul 21, 2009.

  1. Humanityrulz

    Thread Starter Active Member

    Jul 21, 2009
    Hi i am building the magnetic detector transmitter and receiver circuit, every thing work fine in room temperature and upto35 to 40degress, when temp reaches to 60degrees, signal strength decreasing, Can anyone tell me the reason.
    ~When its cools down (room temperature) its working fine. I checked the all components operating temperatre and connections.

    I have some doubts,
    1) When temp increases, how would be the signal strenght for 20Hz ?
    2) Can I add Temperature compensate circuit before LNA OPAMP to aviod temp varia's? How can i add that to LNA opamp?

    PLEASE help me out .... i am new to this electronics field .. i like to learn real world things rather than theory .... where can i get good material to solve these types of problems.... URGENT......PLEASE REPLY ASAP
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    We are not familiar with the circuit. Can you post a schematic?