The NTE996 is a programmable transconductance block intended to fulfill a wide variety of variable gain applications. This device has differential inputs and high impedance push–pull outputs. The NTE996 has high input impedance and its transconductance (gm) is directly proportional to the amplifier bias current (IABC).
High slew rate together with programmable gain make the NTE996 an ideal choice for variable gain applications such as sample and hold, multiplexing, filtering, and multiplying.
 
Full spec sheet:
https://www.nteinc.com/specs/900to999/pdf/nte996.pdf