1. What is Ground Capacitance?

Ground Capacitance is the capacitance at the ground of the CMOS Circuit. It plays a crucial role in determining the circuit's performance and signal integrity.

2. How Does the Calculator Work?

The calculator uses the Ground Capacitance formula:

Where:

• \( C_{gnd} \) — Ground Capacitance (F)
• \( V_{agr} \) — Agressor Voltage (V)
• \( C_{adj} \) — Adjacent Capacitance (F)
• \( V_{tm} \) — Victim Voltage (V)

Explanation: This formula calculates the ground capacitance based on the aggressor voltage, adjacent capacitance, and victim voltage in a CMOS circuit.

3. Importance of Ground Capacitance Calculation

Details: Accurate ground capacitance calculation is essential for proper circuit design, signal integrity analysis, and minimizing noise interference in CMOS circuits.

4. Using the Calculator

Tips: Enter aggressor voltage in volts, adjacent capacitance in farads, and victim voltage in volts. All values must be positive and valid.

5. Frequently Asked Questions (FAQ)

Q1: What is Agressor Voltage in CMOS circuits?
A: Agressor Voltage refers to the avoided voltage in a CMOS circuit, which is typically a small positive voltage added to the input signal to avoid unwanted triggering of the circuit.

Q2: What is Victim Voltage?
A: Victim Voltage is calculated when the victim is being actively driven, then the driver will supply current to oppose to reduce the victim's noise.

Q3: What are typical values for Adjacent Capacitance?
A: Adjacent capacitance values are typically in the picofarad (pF) range for most CMOS circuit applications.

Q4: Why is Ground Capacitance important in circuit design?
A: Ground capacitance affects signal propagation, noise margins, and overall circuit performance in high-frequency applications.

Q5: Can this formula be used for all types of circuits?
A: This formula is specifically designed for CMOS circuits and may not be directly applicable to other circuit technologies without modifications.