- Asked 3/26
- 2071 Chaitra · 3 marks
Inverting: zero at -2, pole at -5, HF gain 2
Short answer
For the inverting realization of −2(s+2)/(s+5): R1=25 kΩ, C1=20 μF (input parallel), R2=20 kΩ, C2=10 μF (feedback). HF gain2, zero −2, pole −5. Add inverter for positive sign.
Realize a system using inverting op-amp configuration with zero at s = -2 and pole at s = -5 and having high frequency gain of 2.
Required function: zero at , pole at , HF gain 2:
Inverting configuration: from the input to the inverting input, in feedback:
With (parallel ) and (parallel ):
+---R2---+
| |
+---||---+
R1 | C2 |
+--/\/\--+ | |
Vin +--+-|-\ |
+---||---+ | >---+--- Vo
C1 GND-|+/
Matching:
Normalized: F, F, , .
Practical values (impedance scale , ):
| Element | Normalized | Final |
|---|---|---|
| 0.25 Ω | 25 kΩ | |
| 2 F | 20 μF | |
| 0.2 Ω | 20 kΩ | |
| 1 F | 10 μF |
Check: DC gain ; HF gain .
Answer: , F, , F, realizing . The minus sign is the 180° phase inversion of this configuration; a unity-gain inverter can follow if a positive sign is needed.
✓ Answer checked by Claude Sonnet 5.5
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