Case History Notebook
Audio Delay Line for Mobile Radio Repeater System The Challenge: Existing analog audio delay IC was expensive, sole-sourced, and extremely prone to failure. Failure mode caused total system failure of radio repeater system. The Solution: Designed an audio delay based on inexpensive, common, CODEC and DRAM devices. Circuit exhibited lower noise levels than analog predecessor and provided programmable delay duration. Result: Failure rate of 40% average per year reduced to unmeasurable levels - estimated $20K savings per year plus immeasurable customer goodwill.