31. When a delay line is used as a memory device, an amplifier and a microseconds. 32. Most early computers used some form of serial memory ( primarily delay line memory ). 33. Electric delay lines are used for shorter delay times ( ns to several �s ). 34. On the send section the channel circuit includes a delay line feeding a repetition storage. 35. The length of any digital delay line is a whole-number multiple of the sampling period. 36. This arrangement allowed the designers to create " delay lines " of any desired length. 37. It uses an analog delay line , a memory device, for storing one line of color information. 38. Jeffery s tromboscillator combines and mutates the trombone with oscillators, ring modulators, filters and delay lines . 39. It uses bi-directional delay lines ( or transmission line elements, TLM ) to connect different components. 40. Analog delay line technology had been used since the 1920s to delay the propagation of analog signals.