1. What is Pole Frequency High Pass?

Pole Frequency High Pass is the point at which the signal has been attenuated by 3dB in a bandpass filter. It represents the frequency where the circuit's response begins to roll off for high-pass characteristics.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( f_{hp} \) — Pole Frequency High Pass (Hz)
• \( C_{be} \) — Emitter-Base Capacitance (F)
• \( C_{bj} \) — Collector-Base Junction Capacitance (F)
• \( R_{in} \) — Finite Input Resistance (Ω)

Explanation: The formula calculates the high-pass pole frequency based on the combined capacitance and input resistance in the circuit.

3. Importance of Pole Frequency Calculation

Details: Accurate pole frequency calculation is crucial for designing and analyzing high-pass filters, ensuring proper frequency response characteristics in electronic circuits.

4. Using the Calculator

Tips: Enter all capacitance values in Farads and resistance in Ohms. All values must be positive and non-zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is the significance of the 3dB point?
A: The 3dB point represents the frequency where the output power is half the input power, marking the beginning of the filter's roll-off region.

Q2: How do capacitance values affect the pole frequency?
A: Higher capacitance values result in lower pole frequencies, while lower capacitance values yield higher pole frequencies.

Q3: What is the role of input resistance in this calculation?
A: The input resistance, combined with the capacitance, forms the RC time constant that determines the pole frequency.

Q4: Can this formula be used for different circuit configurations?
A: This specific formula is designed for STC (Single Time Constant) circuits with the given capacitance and resistance configuration.

Q5: What are typical units for the calculated frequency?
A: The pole frequency is typically expressed in Hertz (Hz), though for high-frequency applications it may be expressed in kHz or MHz.