RC high-pass filter

Tags

• Electronics
• Filters and frequency response
• physics
• Electronics formula
• physics formula

Detail

Explore the idea

Variables

• $H(j\omega)$dimensionless
• $\omega$rad/s
• $f_c,f_0$Hz
• $R,C,L$Ω, F, H
• $Q$dimensionless.

Conditions

• Linear time-invariant filter; light load unless stated.

Intuitive explanation

For “RC high-pass filter”: |H(jω)| shows the passband and fc marks the −3 dB Bode point.

Worked example

Common mistakes

• using ωc in place of fc or the reverse
• forgetting load shift of the cutoff
• mixing dB with linear gain

Frequently asked questions

What must be checked before using the RC high-pass filter relation?

Identify the filter type, fc and load effect on H(jω).

Also known as

• high-pass filter, cutoff frequency, Bode plot, −3 dB

Related topics

• Filters and Bode plots

Conventions

• dimensionless, Hz or dB

Related formulas

• Related

  RC cutoff frequency

  $$f_c=\frac{1}{2\pi RC}$$
  Open formulaOpen in section

• Related

  RL low-pass filter

  $$H(j\omega)=\frac{R}{R+j\omega L}$$
  Open formulaOpen in section

• Related

  Impedance

  $$Z=R+jX$$
  Open formulaOpen in section

• Related

  Admittance

  $$Y=\frac{1}{Z}$$
  Open formulaOpen in section