Amplifier Current vs. P1dB
| P1dB Approximation using Current |
|---|
| ~P1dB = 10 * Log( (mA/1414)^2 * Lz * 1000 )
Example at 20mA |
| ~P1dB = 10 * Log( (20/1414)^2 * 200 * 1000 ) = +16.0dBm
Oscilloscope Using Voltage |
| 2N5109 | |||
|---|---|---|---|
| mA | P1dB dBm | Approximate dBm | Delta dB |
| 40 | 21.5 | 22.0 | 0.5 |
| 30 | 19.1 | 19.5 | 0.4 |
| 20 | 15.5 | 16.0 | 0.5 |
| 10 | 9.3 | 10.0 | 0.7 |
| 2N2219A | |
|---|---|
| mA | P1dB dBm |
| 40 | 21.2 |
| 30 | 19 |
| 20 | 15.5 |
| 10 | 9.0 |
Schematic
