Relay Stepped Attenuator Schematic

Overview δ1 delta 1 is a high end stereo stepped attenuator implemented in a r 2r resistor laddertopology.

Relay stepped attenuator schematic.

However relay attenuators do have a couple of advantages among which that they can be built for a reasonable cost. It uses high quality miniature latching relays and precision discrete resistors to achieve a level of performance unattainable with conventional potentiometers or mechanical switch based rotary stepped attenuators. δ1 v1 0 boards are now available at amb audio shop. By avoiding any active.

In a high end audio system a noticable sound improvement over potentiomeneters is obtained also compared to audio grade potentiometers. Relay attenuator shield has been designed for audio attenuation after piano dac output by 1db step size its compact and simple circuit just 6 tiny relays implement a 64 step logarithmic stereo attenuation the 64 steps of 1 0db together span a 63db audio attenuation range. A stepwise volume control is implemented with a set of tiny relays and resistors. 256 steps 0 5 db step size.

Its ir remote control provides convenience over solutions with stepped attenuator rotary switches. A stepped attenuator also has very good channel matching but whereas even the expensive dact only gets you 24 steps typically with 2db between them 128 or even 256 steps of 0 5db each are quite easily achieved with relays. The differential amplifier removes common mode interference while maximizing the use of the voltage headroom in the 256 step attenuator.