Attenuators & Pads Formulas
Attenuators & Pads formulas cover Attenuation Factor (K), T-Pad Series Resistor, T-Pad Shunt Resistor and more. These calculators let you solve for any unknown by entering the values you already know. Use them for quick design checks, study, and verifying real circuits.
Attenuators & Pads Formula Calculators
- Attenuation Factor (K) K = 10^(dB / 20) Attenuation 0.3 dB → Voltage Ratio K = 1.035
- T-Pad Series Resistor R1 = Z · (K−1)/(K+1) Characteristic Impedance 2.2 Ω, Attenuation 0.3 dB → Series Resistor = 37.99 mΩ
- T-Pad Shunt Resistor R3 = 2 · Z · K / (K² − 1) Characteristic Impedance 2.2 Ω, Attenuation 0.3 dB → Shunt Resistor = 63.68 Ω
- Pi-Pad Series Resistor R2 = Z · (K² − 1) / (2K) Characteristic Impedance 2.2 Ω, Attenuation 0.3 dB → Series Resistor = 76 mΩ
- Pi-Pad Shunt Resistor R1 = Z · (K + 1)/(K − 1) Characteristic Impedance 2.2 Ω, Attenuation 0.3 dB → Shunt Resistor = 127.4 Ω
- Bridged-T Bridge Resistor Rb = Z · (K − 1) Characteristic Impedance 2.2 Ω, Attenuation 0.3 dB → Bridge Resistor = 77.31 mΩ
- Bridged-T Shunt Resistor Rs = Z / (K − 1) Characteristic Impedance 2.2 Ω, Attenuation 0.3 dB → Shunt Resistor = 62.6 Ω
Worked result for every Attenuators & Pads formula
| Formula | Expression | Worked result |
|---|---|---|
| Attenuation Factor (K) | K = 10^(dB / 20) | Attenuation 0.3 dB → Voltage Ratio K = 1.035 |
| T-Pad Series Resistor | R1 = Z · (K−1)/(K+1) | Characteristic Impedance 2.2 Ω, Attenuation 0.3 dB → Series Resistor = 37.99 mΩ |
| T-Pad Shunt Resistor | R3 = 2 · Z · K / (K² − 1) | Characteristic Impedance 2.2 Ω, Attenuation 0.3 dB → Shunt Resistor = 63.68 Ω |
| Pi-Pad Series Resistor | R2 = Z · (K² − 1) / (2K) | Characteristic Impedance 2.2 Ω, Attenuation 0.3 dB → Series Resistor = 76 mΩ |
| Pi-Pad Shunt Resistor | R1 = Z · (K + 1)/(K − 1) | Characteristic Impedance 2.2 Ω, Attenuation 0.3 dB → Shunt Resistor = 127.4 Ω |
| Bridged-T Bridge Resistor | Rb = Z · (K − 1) | Characteristic Impedance 2.2 Ω, Attenuation 0.3 dB → Bridge Resistor = 77.31 mΩ |
| Bridged-T Shunt Resistor | Rs = Z / (K − 1) | Characteristic Impedance 2.2 Ω, Attenuation 0.3 dB → Shunt Resistor = 62.6 Ω |
Variables used across Attenuators & Pads formulas
- K — Voltage attenuation ratio (input/output)
- dB — Attenuation in decibels
- R1 — Each series arm resistor (Ω)
- Z — Characteristic (source = load) impedance (Ω)
- R3 — Shunt resistor to ground (Ω)
- R2 — Series (bridging) resistor (Ω)
- Rb — Bridge resistor across the series arms (Ω)
- Rs — Shunt resistor to ground (Ω)
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