Balanced Audio Line Driver Circuit

There is nothing to grumble at but there is one essential difference between an output like the described one and a transformer coupled one.

Balanced audio line driver circuit.

You can wire the balanced output directly after an unbalanced circuit or to a ts 2 pin 1 4 jack. Balanced unbalanced converter for audio work. So in this case amplifier 2 is left out and the left hand side of resistor r2 is grounded. However in some cheaper balanced line drivers one core does not carry any signal but is grounded instead.

Floating balanced line drivers. The signal is 1db down at 10hz and 30khz which is pretty good considering the overall simplicity of the circuits. If one of the cores is grounded as in the cheaper type of balanced driver. By walt jung and adolfo garcia download pdf.

The line driver rod describes in his article is quite simple too. The following data taken from the thd test circuit on an audio precision system one using the internal 80 khz noise filter demonstrates the typical performance of a balanced. The audio input should be an unbalanced professional 4dbu line level audio signal. The response graph shows the measured frequency response with the differential feed a balanced line driver figure 1 and receiver figure 2.

The common mode output resistance a common voltage applied to the output will cause a considerable common mode current into the. The first article in this series analog dialogue 26 2 covering general line driving and buffer design considerations gave examples of video line driver and receiver designs. A balanced line driver ssm2142 features transformer like balanced output drives 10 v rms into a 600 v load stable when driving large capacitive loads and long cables. Goes to the next circuit s audio input or ts tip ground unlabeled on pcb goes to the next circuit s audio ground or ts sleeve balanced output.

Op amps in line driver and receiver circuits part 2. Open in new find other audio line drivers description. Balanced line drivers vs. The drv134 and drv135 are differential output amplifiers that convert a single ended input to a balanced output pair.

This balanced audio driver consists of high performance op amps with on chip precision resistors. They are fully specified for high performance audio applications. In telecommunications and professional audio a balanced line or balanced signal pair is a transmission line consisting of two conductors of the same type each of which have equal impedances along their lengths and equal impedances to ground and to other circuits. In this article we consider audio line drivers and receivers.