本文介绍的新型高速中规模集成数字频率合成器是由高速ECL集成的前置分频器(脉冲吞除计数器)、中速TTL集成的二-十进制同步可逆可预置计数器、数字集成鉴相器与环络滤波器,集成负阻压控振荡器以及一些TTL电路组成.逻辑设计打破了过去习惯采用的“九置定”、“九读出”法,而采用“零置定”、“零读出”的新方法.这样便于和计算机直接连接进行实时 This article describes the new high-speed large-scale integrated digital frequency synthesizer is a high-speed ECL integrated prescaler (pulse swallow counter), medium speed TTL integrated two-decade synchronous reversible presettable counter, digital integrated phase detector And loop filter, integrated negative voltage-controlled oscillator and some TTL circuits. The logic design breaks the convention of using “nine set”, “nine read out” and the traditional zero setting Set “, ” zero read out "new method, so easy to connect directly with the computer in real time