Hybrid logic families Which logic technology combines the advantages of CMOS (low power, high input impedance) with the speed or drive of bipolar TTL devices?

Introduction / Context:
Modern integrated circuits often blend device types to optimize speed, power, and drive. The term for a technology that integrates both bipolar and CMOS transistors on the same die is crucial when evaluating families that promise “best of both worlds.”

Given Data / Assumptions:

• CMOS benefits: very low static power, high noise margins, excellent scaling.
• Bipolar (TTL-like) benefits: strong drive currents, fast analog behavior in certain regions.
• Goal: combine these advantages.

Concept / Approach:

BiCMOS technology integrates Bipolar Junction Transistors (BJTs) with CMOS on a single chip. CMOS handles most logic functions efficiently, while bipolar devices provide high-current output stages or fast analog interfaces, enabling improved speed and drive without losing CMOS efficiency.

Step-by-Step Solution:

Verification / Alternative check:

Common parts like high-speed buffers and microprocessors historically employed BiCMOS output drivers to achieve strong drive while keeping core logic CMOS.

Why Other Options Are Wrong:

• TTL/CMOS or TTL/MOS are informal phrases, not established process names.
• ECL is a distinct high-speed bipolar family with constant-current operation, not CMOS-hybrid.

Common Pitfalls:

• Assuming any TTL-compatible input means it is a “hybrid”; compatibility does not define the process.

Final Answer:

BiCMOS