| Author |
Message |
asimo
Joined: 24 Sep 2008
Posts: 4
|
 24 Sep 2008 21:16 DC voltgae multiplier |
|
|
|
hi i need a DC voltage multiplier .multiplier should be with charactristic:
high speed : 1gHz
very low power
can't use op-amp
and high accuracy (0.001%)
please help me.
|
|
| Back to top |
|
 |
FvM
Joined: 22 Jan 2008
Posts: 2635
Helped: 431
Location: Bochum, Germany
|
| 25 Sep 2008 7:44 Re: DC voltgae multiplier |
|
|
|
| Quote: |
| high speed : 1gHz ... and high accuracy (0.001%) |
give it up!
|
|
| Back to top |
|
|
asimo
Joined: 24 Sep 2008
Posts: 4
|
| 25 Sep 2008 8:14 Re: DC voltgae multiplier |
|
|
|
| i really really need to this circuit .i have a circuit with capacitor and swtich but swtich is not ideal thus i can't implementation .
|
|
| Back to top |
|
|
FvM
Joined: 22 Jan 2008
Posts: 2635
Helped: 431
Location: Bochum, Germany
|
| 25 Sep 2008 12:35 DC voltgae multiplier |
|
|
|
| Let me try different. 1 GHz multiplier isn't an issue. Please specify, what means accuracy for you.
|
|
| Back to top |
|
|
asimo
Joined: 24 Sep 2008
Posts: 4
|
| 28 Sep 2008 7:03 Re: DC voltgae multiplier |
|
|
|
excuse me!i'm very busy.my concept of accuracy is shown in example ( input is 0.002 multiply to 8 that result should be 0.015 or 0.017 .my input range is ( 0 - 1v).this accuracy need becuse of my voltage multiply to multiple stage .
thank you.
have a nice time.
|
|
| Back to top |
|
|
FvM
Joined: 22 Jan 2008
Posts: 2635
Helped: 431
Location: Bochum, Germany
|
| 28 Sep 2008 9:27 Re: DC voltgae multiplier |
|
|
|
| This sounds like a G=+8 amplifier rather than a multiplier. If the amplifier should be DC capable, a GHz OP is a solution.
|
|
| Back to top |
|
|
asimo
Joined: 24 Sep 2008
Posts: 4
|
| 28 Sep 2008 11:29 Re: DC voltgae multiplier |
|
|
|
I don't use a op-amp because its power dissipation is high.my circuit power dissipation must max 300mw .so op-amp area is rather than a simple circuit.
please if i mistake ,tell me my mistake .
Added after 6 minutes:
I don't use a op-amp because its power dissipation is high.my circuit power dissipation must max 300mw .so op-amp area is rather than a simple circuit.
please if i mistake ,tell me my mistake .
|
|
| Back to top |
|
|
wudanyu
Joined: 02 Oct 2008
Posts: 4
|
| 02 Oct 2008 14:42 Re: DC voltgae multiplier |
|
|
|
| FvM wrote: |
| This sounds like a G=+8 amplifier rather than a multiplier. If the amplifier should be DC capable, a GHz OP is a solution. |
G=+8 means it needs a 8GHz OP... Does that exist by now?
|
|
| Back to top |
|
|
FvM
Joined: 22 Jan 2008
Posts: 2635
Helped: 431
Location: Bochum, Germany
|
| 03 Oct 2008 10:22 DC voltgae multiplier |
|
|
|
Devices, I'm familiar to as THS3201 achieve about 600 MHz at G=8. The device would also keep the 300 mW requirement. Cause these are CFB amplifiers, the gain bandwidth product can be partly increased at higher gains. I assume, that faster CFB OPs are possible, but I'm not aware of commercial devices. Mainly, cause I didn't need them yet.
However, it's somewhat unworldly to talk about 1 GHz bandwidth without specifying source and load impedances.
|
|
| Back to top |
|
|
