Precision rectifier
Precision rectifier with circuit equations and operating-limit checks.
Development preview. Check the assumptions below before relying on a result. Calculations run in your browser.
How it calculates
Full-wave average: Vavg = 2 Vpeak/π
Half-wave average: Vavg = Vpeak/π
Slew limit: f ≤ SR/(2π Vpeak)
Assumptions
- Plot shows ideal rectification, without zero-crossing recovery artifacts. A precision topology places the diode within feedback; ordinary diode drop is removed only while the loop is active. Actual rectifier topology, diode capacitance, output headroom and saturation recovery determine low-level accuracy.
Worked example
These are the calculator's default inputs. Change any input above to recalculate.
Inputs
- Rectification
- full
- Input peak amplitude
- 1 V
- Input frequency
- 1000 Hz
- Rectifier gain
- 1
- Op-amp GBW
- 1000000 Hz
- Slew rate
- 500000 V/s
- Ordinary diode drop for comparison
- 0.6 V
- Op-amp saturation recovery time
- 0.000001 s
Results
- Output peak
- 1 V
- Output average
- 0.63662 V
- Output RMS
- 0.707107 V
- Slew-limited frequency
- 79577.5 Hz
- 10× loop-gain screening frequency
- 100000 Hz
- Recovery portion of cycle
- 0.1 %