Description: The HMC1126ACEZ is a gallium arsenide (GaAs), pseudomorphic high electron mobility transfer (pHEMT), low noise amplifier that operates from 400 MHz to 52 GHz. The HMC1126ACEZ provides 12 ...

It consists of a JFET based pre-amplifier ... blog post provides extremely detailed circuit analysis of every part of the design, starting from the power supply filter to remove mains “hum ...

But to make that measurement you need an amplifier circuit designed for the thermocouple being used. Linear Technology LTC 1049 Low Power Zero-Drift Operational Amplifier with Internal Capacitors ...