If we had to pick one part to crown as the universal component in the world of analogue electronics, it would have to be the operational amplifier. The humble op-amp can be configured into so many ...

Are your jellybeans getting stale? [lcamtuf] thinks so, and his guide to choosing op-amps makes a good case for rethinking ...

Patent filed by Karl D. Swartzel Jr. of Bell Labs for a "Summing Amplifier," with a design that could well be the genesis of op amps. Patent not issued until 1946. George Philbrick founds company, ...

Part 5 provides spec summary of the GP/R K2-W vacuum-tube op amp and discusses measurement constraints/conditions and LTspice modeled output. The K2-W vacuum-tube op ...