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2N3904 TRANSISTOR using darlington amplifier

Abstract: crystal 20Mhz of 2n3904 10mhz crystal oscillator 74LS04 as colpitts oscillator 74LS04 LT1034 20MHz quartz crystal crystal oscillator 4049 LT1011
Text: Application Note 12 October 1985 Circuit Techniques for Clock Sources Jim Williams Almost all digital or communication systems require some form of clock source. Generating accurate and stable clock signals is often a difficult design problem. Quartz crystals are the basis for most clock sources. The