The speed of ______ circuits is limited by the tendency of common emitter circuits to go into saturation.(a) TTL(b) ECL(c) RTL(d) DTLI have been asked this question during an interview for a job.My doubt is from Transistor Transistor Logic(TTL) topic in section Logic Families of Digital Circuits

The speed of ______ circuits is limited by the tendency of common emit

1.	The speed of ______ circuits is limited by the tendency of common emitter circuits to go into saturation.(a) TTL(b) ECL(c) RTL(d) DTLI have been asked this question during an interview for a job.My doubt is from Transistor Transistor Logic(TTL) topic in section Logic Families of Digital Circuits
Answer» RIGHT option is (a) TTL Explanation: The speed of TTL CIRCUITS is limited by the tendency of common emitter circuits to go into saturation DUE to the injection of MINORITY carriers into the collector region. Hence, it functions slowly compared to CMOS devices.

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