THE 733 AS A LOW-INPUT-IMPEDANCE PREAMPLIFIER FOR CURRENT-DIVISION USE

摘要

By grounding the usual inputs of a 733 amplifier chip and driving one of the gain-control pins, one obtains a common-base input stage with an input impedance of about 20 ohms. This can be used as an inexpensive current division preamp and, in large multichannel systems, will probably not limit the performance.