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, ...

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 ...

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 ...