The (Henry P.) Hall network is a widely tunable notch filter,tuned by a pot. It was a key part of the GR1232A (1961) It's still useful today. Here's how to design one. Fig 1. Shown is the original ...

DALLAS, May 10 /PRNewswire/ — Texas Instruments Incorporated (TI) (NYSE: TXN) today introduced the latest version of its popular FilterPro™ design tool. FilterPro v3.0 offers a new and improved user ...