A.C. Voltage Vector-Indicating Adapter

Abstract

In detecting the balance of the A.C. bridge, it is convenient if the unbalance voltage is indicated in the form of vector. An indicator of this type using vacuum tubes has been reported before. Described in this paper is a new type with some advantages as follows:
1) Smaller size by being transistorized.
2) High sensitivity by using transistor synchronous commutator.
3) No power supply source.
When this adapter is connected between the amplifier and C.R. oscilloscope containing d.c. amplifier, 3V output is gained from 0.2V signal voltage to the adapter at 24V reference voltage and this output is large enough for full spot movement on the C.R. tube.