I am looking for Thermocouple Circuit Scematic using less expensive componenets like Op-Amps and Transistor Etc. Any url in this regard will be appreciated.
pay a visit to the microchip website and search for thermocouple signal conditioning. there are a number of application notes that use just op-amps (instrumentation amplifiers). www.microchip.com
also analog devices offers some excellent (but expensive) thermocouple inteface ICs like the AD594 and AD595. www.ti.com