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2nd order CR filter Design tools

This page is a web calculator 2nd order CR filter from combinations of two CR 1st order filters. Use this utility to calculate the Transfer Function for filters at a given values of R and C. The response of the filter is displayed on graphs, showing Bode diagram, Nyquist diagram, Impulse response and Step response.
♦Filters
RC LPF
RC HPF
LR LPF
LR HPF
RLC LPF
RLC HPF
RLC BPF
RLC BEF
Sallen-Key LPF
Sallen-Key HPF
3rd order SallenKeyLPF
3rd order SallenKeyHPF
Multiple feedback LPF
Multiple feedback HPF
Multiple feedback BPF
3rd order Multiple feedback LPF
3rd order Multiple feedback HPF
TwinT notch
CR 2nd order LPF,HPF,BPF
Active filter


Filter index

Calculate the transfer function for 2nd order CR low-pass filter with R and C values
Vi(s)→ →Vo(s)
R1=Ω C1=F
R2=Ω C2=F
p:pico, n:nano, u:micro, k:kilo, M:mega
Frequency analysis Bode diagram
    Phase  Group delay
Nyquist diagram
Pole, zero
Phase margin
Oscillation analysis
Analysis on frequency range:
  f1=∼f2=[Hz] (optional)
Transient analysis Step responseImpulse response
Overshoot
Final value of the step response
Analysis on time range:
  0∼[sec] (optional)

Calculate the transfer function for 2nd order CR high-pass filter with R and C values
Vi(s)→ →Vo(s)
R1=Ω C1=F
R2=Ω C2=F
p:pico, n:nano, u:micro, k:kilo, M:mega
Frequency analysis Bode diagram
    Phase  Group delay
Nyquist diagram
Pole, zero
Phase margin
Oscillation analysis
Analysis on frequency range:
  f1=∼f2=[Hz] (optional)
Transient analysis Step responseImpulse response
Overshoot
Final value of the step response
Analysis on time range:
  0∼[sec] (optional)

Calculate the transfer function for 2nd order CR band-pass filter with R and C values
Vi(s)→ →Vo(s)
R1=Ω C1=F
R2=Ω C2=F
p:pico, n:nano, u:micro, k:kilo, M:mega
Frequency analysis Bode diagram
    Phase  Group delay
Nyquist diagram
Pole, zero
Phase margin
Oscillation analysis
Analysis on frequency range:
  f1=∼f2=[Hz] (optional)
Transient analysis Step responseImpulse response
Overshoot
Final value of the step response
Analysis on time range:
  0∼[sec] (optional)


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