ChatDiagram
CMOS-LOGIC

CMOS 3-Input XNOR Gate

A worked cmos-logic example, rendered live. Open it in the AI editor and adapt it to your own case.

UPDATED 2026-09-23
TYPECircuit
USE-CASECmos Logic Gate Circuits
EXAMPLECMOS 3-Input XNOR Gate
Make this diagram your own.

Open it in the AI editor with a prompt pre-filled — keep what works, change what doesn't.

CASE ANALYSIS

Scenario

Design of a compact CMOS XNOR gate for custom VLSI digital logic, where a single 3-input exclusive-nor function is needed without relying on a standard-cell library.

Key decisions

  • Decompose XNOR into two cascaded transmission-gate XOR stages and a final inverter
  • Use external complementary inputs (A, A_b, B, B_b, C, C_b) to eliminate internal inverters for the first stage
  • Include one local inverter to generate X_b from the intermediate XOR output

When to reuse this

Suitable when designing dedicated logic blocks in full-custom CMOS, optimizing for area and speed by avoiding pre‑built standard cells.

← See more cmos logic gate circuits examples
Open this example in the editor →

Tweak it with chat, export PNG/SVG, or fork it for your own use case.