Agressor Voltage Calculator

Agressor Voltage Formula:

\[ V_{agr} = \frac{V_{tm} \times (C_{gnd} + C_{adj})}{C_{adj}} \]

Agressor Voltage (Vagr):

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1. What is the Agressor Voltage Formula?

The Agressor Voltage formula calculates 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. This is important for maintaining signal integrity and preventing false triggering in digital circuits.

2. How Does the Calculator Work?

The calculator uses the Agressor Voltage formula:

\[ V_{agr} = \frac{V_{tm} \times (C_{gnd} + C_{adj})}{C_{adj}} \]

Where:

\( V_{agr} \) — Agressor Voltage (Volt)
\( V_{tm} \) — Victim Voltage (Volt)
\( C_{gnd} \) — Ground Capacitance (Farad)
\( C_{adj} \) — Adjacent Capacitance (Farad)

Explanation: The formula calculates the agressor voltage based on the victim voltage and the capacitance values in the circuit, accounting for the capacitive coupling effects between adjacent circuit elements.

3. Importance of Agressor Voltage Calculation

Details: Accurate agressor voltage calculation is crucial for CMOS circuit design to prevent unwanted circuit triggering, maintain signal integrity, and ensure proper circuit operation in the presence of capacitive coupling effects.

4. Using the Calculator

Tips: Enter victim voltage in volts, ground capacitance in farads, and adjacent capacitance in farads. All values must be valid (volt > 0, capacitances >= 0 with adjacent capacitance > 0).

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 prevent unwanted triggering of the circuit due to noise or capacitive coupling.

Q2: When is victim voltage calculated?
A: Victim voltage is calculated when the victim is being actively driven, and the driver supplies current to oppose and reduce the victim's noise in the circuit.

Q3: What is adjacent capacitance?
A: Adjacent capacitance is the capacitance at adjacent points in the circuit, which affects the capacitive coupling between circuit elements.

Q4: What are typical values for these parameters?
A: Victim voltage is typically in volts range, while ground and adjacent capacitances are typically in picofarads (pF) or smaller units for CMOS circuits.

Q5: Are there limitations to this formula?
A: This formula provides a simplified calculation and may need adjustments for complex circuit layouts, high-frequency effects, or other parasitic elements not accounted for in the basic formula.