Compensated probe divider
Compensated probe divider with explicit circuit assumptions and worked equations.
Development preview. Check the assumptions below before relying on a result. Calculations run in your browser.
How it calculates
Compensation: R1 C1 = R2 C2
Step: Vout(t) = Vin [GDC + (GHF − GDC) exp(−t/τ)]
Assumptions
- R1 is shunted by C1 and R2 is shunted by C2. The source is ideal; distributed cable effects and scope frequency dependence are omitted.
Worked example
These are the calculator's default inputs. Change any input above to recalculate.
Inputs
- Probe series resistor
- 9000000 Ω
- Scope input resistance
- 1000000 Ω
- Probe compensation capacitor
- 1e-11 F
- Scope plus cable capacitance
- 9e-11 F
- Input step
- 10 V
Results
- Ideal compensation capacitor
- 1e-11 F
- DC gain
- 0.1
- High-frequency gain
- 0.1
- Response time constant
- 0.00009 s