Level shifter - how??

S

Soren

Guest
Hi,

I have a single 0-5V source that I want to convert to a -2.5 to 2.5V
source instead.. can anyone tell me what the name of such a circuit
is? or even have a link/reference on such a circuit?

Thanks!
Soren
 
On Thu, 4 Dec 2008 06:01:49 -0800 (PST), Soren
<soren.skou.nielsen@gmail.com> wrote:

Hi,

I have a single 0-5V source that I want to convert to a -2.5 to 2.5V
source instead.. can anyone tell me what the name of such a circuit
is? or even have a link/reference on such a circuit?
Click to expand...
---
View in Courier:
+V
|
0->5V---[10k]----+-----------|+\
| | >---+-->-2.5V->+2.5V
[10k +--|-/ |
| | | [10k]
| | -V |
GHND>------------+ +---------+
|
[10k]
|
2.5V>-------------------------------+
JF
 
On Thu, 04 Dec 2008 12:04:20 -0600, John Fields
<jfields@austininstruments.com> wrote:

On Thu, 4 Dec 2008 06:01:49 -0800 (PST), Soren
soren.skou.nielsen@gmail.com> wrote:

Hi,

I have a single 0-5V source that I want to convert to a -2.5 to 2.5V
source instead.. can anyone tell me what the name of such a circuit
is? or even have a link/reference on such a circuit?

---
View in Courier:
+V
|
0->5V---[10k]----+-----------|+\
| | >---+-->-2.5V->+2.5V
[10k +--|-/ |
| | | [10k]
| | -V |
GHND>------------+ +---------+
|
[10k]
|
2.5V>-------------------------------+
Click to expand...
---
Version 4
SHEET 1 880 680
WIRE 176 48 -368 48
WIRE 288 48 256 48
WIRE 480 48 288 48
WIRE 480 80 480 48
WIRE 352 128 -256 128
WIRE 352 160 352 128
WIRE 288 176 288 48
WIRE 320 176 288 176
WIRE 480 192 480 160
WIRE 480 192 384 192
WIRE -32 208 -128 208
WIRE 96 208 48 208
WIRE 320 208 96 208
WIRE -368 272 -368 48
WIRE -256 272 -256 128
WIRE -128 272 -128 208
WIRE 96 272 96 208
WIRE 352 272 352 224
WIRE -368 400 -368 352
WIRE -256 400 -256 352
WIRE -256 400 -368 400
WIRE -128 400 -128 352
WIRE -128 400 -256 400
WIRE 96 400 96 352
WIRE 96 400 -128 400
WIRE 352 400 352 352
WIRE 352 400 96 400
WIRE -368 464 -368 400
FLAG -368 464 0
SYMBOL Opamps\\LT1007 352 128 R0
SYMATTR InstName U1
SYMBOL voltage -256 256 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL res 64 192 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 10K
SYMBOL voltage -128 256 R0
WINDOW 3 24 104 Invisible 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value PULSE(0 5 0 1)
SYMBOL voltage 352 368 R180
WINDOW 0 24 104 Left 0
WINDOW 3 24 16 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 5
SYMBOL res 496 176 R180
WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R3
SYMATTR Value 10K
SYMBOL voltage -368 256 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V4
SYMATTR Value 2.5
SYMBOL res 112 368 R180
WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL res 272 32 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 10K
TEXT -344 432 Left 0 !.tran 2 uic

JF
 
John Fields wrote:

On Thu, 4 Dec 2008 06:01:49 -0800 (PST), Soren
soren.skou.nielsen@gmail.com> wrote:

Hi,

I have a single 0-5V source that I want to convert to a -2.5 to 2.5V
source instead.. can anyone tell me what the name of such a circuit
is? or even have a link/reference on such a circuit?

---
View in Courier:
+V
|
0->5V---[10k]----+-----------|+\
| | >---+-->-2.5V->+2.5V
[10k +--|-/ |
| | | [10k]
| | -V |
GHND>------------+ +---------+
|
[10k]
|
2.5V>-------------------------------+
Click to expand...
You had me puzzled there until I realised it was to avoid using a
negative voltage although he'll need one anyway to get the -2.5 output.

Can't reduce the parts count though.

Graham
 
On 4 Dec., 19:04, John Fields <jfie...@austininstruments.com> wrote:
On Thu, 4 Dec 2008 06:01:49 -0800 (PST), Soren

soren.skou.niel...@gmail.com> wrote:
Hi,

I have a single 0-5V source that I want to convert to a -2.5 to 2.5V
source instead.. can anyone tell me what the name of such a circuit
is? or even have a link/reference on such a circuit?

---
View in Courier:
                             +V
                              |
0->5V---[10k]----+-----------|+\
                 |           |  >---+-->-2.5V->+2.5V
               [10k       +--|-/    |
                 |        |   |   [10k]
                 |        |  -V     |
GHND>------------+        +---------+
                                    |
                                  [10k]
                                    |
2.5V>-------------------------------+
JF  
Click to expand...
Thanks John!
 
On Fri, 5 Dec 2008 09:38:15 -0800 (PST), Soren
<soren.skou.nielsen@gmail.com> wrote:

On 4 Dec., 19:04, John Fields <jfie...@austininstruments.com> wrote:
On Thu, 4 Dec 2008 06:01:49 -0800 (PST), Soren

soren.skou.niel...@gmail.com> wrote:
Hi,

I have a single 0-5V source that I want to convert to a -2.5 to 2.5V
source instead.. can anyone tell me what the name of such a circuit
is? or even have a link/reference on such a circuit?

---
View in Courier:
                             +V
                              |
0->5V---[10k]----+-----------|+\
                 |           |  >---+-->-2.5V->+2.5V
               [10k       +--|-/    |
                 |        |   |   [10k]
                 |        |  -V     |
GHND>------------+        +---------+
                                    |
                                  [10k]
                                    |
2.5V>-------------------------------+
JF  

Thanks John!
Click to expand...
---
My pleasure. :)

JF
 
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