11. Such sophisticated mounts are often required for lasers, interferometers, and optical delay lines . 12. Inductor capacitor ladder networks were used as analog delay lines in the 1920s. 13. Chip-scale OEOs utilize whispering gallery mode optical resonators rather than a delay line . 14. ;Electro-acoustic memory : Delay line memory used mercury to store information. 15. Early electronic computers were generally programmed by being rewired, or via delay lines . 16. The IBM 2848 delay line was a continuous electromechanical feedback loop. 17. The synthesizer operated using sawtooth wave delay lines triggered by low frequency oscillators. 18. The output is combined in a delay line with decreasing impedance. 19. :: : Accurate analogue delay lines are not easy to build. 20. As the delay line position is stepped, the reflected beam properties are measured.
