| ??? 01/01/10 23:04 Read: times |
#172107 - Rd(on) versus gain Responding to: ???'s previous message |
Rd(on) is the slope of the drain curves near the origin. This is why the datasheet early mentioned speaks of Rd(on)@Id=1mA.
Gain is connected with dId/dVgs (transconductance) or dVgs/dId. This is how "separate" (in Id miliamps) are constant Vgs drain current curves. I mean, for Vds fixed, take a little Vgs change and see how much change in Id happened. Normally, you will not use the JFET amplifier in the Rd(on) area. Lower Rd(on) will only give you a little more Vds swing for higher Vgs (saturation area). Daniel |
| Topic | Author | Date |
| Device characterization | 01/01/70 00:00 | |
| DC tests and DC tests | 01/01/70 00:00 | |
| DC test | 01/01/70 00:00 | |
| As I said you need AC and DC tests | 01/01/70 00:00 | |
| Not necessarily... | 01/01/70 00:00 | |
| Datasheet? | 01/01/70 00:00 | |
| None unfortunately | 01/01/70 00:00 | |
| What about other datasheets | 01/01/70 00:00 | |
| Datasheet? | 01/01/70 00:00 | |
| datasheet | 01/01/70 00:00 | |
| I would give this a try... | 01/01/70 00:00 | |
| DC and AC tests | 01/01/70 00:00 | |
| Very useful (but still some confusion) | 01/01/70 00:00 | |
| Some answers... | 01/01/70 00:00 | |
| Rds versus Vgsoff... | 01/01/70 00:00 | |
| Exact match | 01/01/70 00:00 | |
| But with higher Rdon | 01/01/70 00:00 | |
| Should not be important | 01/01/70 00:00 | |
| Which one? | 01/01/70 00:00 | |
| "the amplifier circuit" | 01/01/70 00:00 | |
| Ri versus Rds(on)... | 01/01/70 00:00 | |
| Higher Rd(on) affects Ri? | 01/01/70 00:00 | |
Rd(on) versus gain | 01/01/70 00:00 |