Relay Stepped Attenuator Schematic

δ1 v1 0 boards are now available at amb audio shop.

Relay stepped attenuator schematic. Overview δ1 delta 1 is a high end stereo stepped attenuator implemented in a r 2r resistor laddertopology. However relay attenuators do have a couple of advantages among which that they can be built for a reasonable cost. Attenuator that provides good performance yet can be built with a few basic tools 1 this unit is designed for use in 50 ω line provides a total attenuation of 71 db in 1 db steps offers respectable accuracy and insertion loss through 225 mhz. It is very unusual to see a stepped attenuator with more than 64 steps.

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. 256 steps 0 5 db step size. The differential amplifier removes common mode interference while maximizing the use of the voltage headroom in the 256 step attenuator. 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 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. Its ir remote control provides convenience over solutions with stepped attenuator rotary switches. By avoiding any active.