Differences between revisions 3 and 4
⇤ ← Revision 3 as of 2009-12-30 07:27:57 →
Size: 854
Editor: RanaAdhikari
Comment:
← Revision 4 as of 2012-01-03 23:03:06 → ⇥
Size: 860
Editor: localhost
Comment: converted to 1.6 markup
Deletions are marked like this. Additions are marked like this.
Line 1: Line 1:
Rai Weiss designed a low noise FET input amp using the attachment:IF3602.pdf which should have an input voltage noise of 0.3 nV/rHz. Rai Weiss designed a low noise FET input amp using the [[attachment:IF3602.pdf]] which should have an input voltage noise of 0.3 nV/rHz.
Line 3: Line 3:
Josh Myers (of LHO) made a PCB version of it ([http://www.ligo.caltech.edu/docs/D/D060205-A/ D060205-A]). Josh Myers (of LHO) made a PCB version of it ([[http://www.ligo.caltech.edu/docs/D/D060205-A/|D060205-A]]).

Rai Weiss designed a low noise FET input amp using the IF3602.pdf which should have an input voltage noise of 0.3 nV/rHz.

Josh Myers (of LHO) made a PCB version of it (D060205-A).

It is basically a differential amplifier made up of the IF3602 dual-FET followed by a LT1128. It has 9V batteries for power.

We want to make a newer, better version of this preamp.

Notes on the New Version

  1. Use panel mount BNC, not board mount.
  2. LED indicator of battery health should be a temporary 'Batt Test' switch, not an always on.
  3. Need an alternate input for power (e.g. Banana from the SR560, or the 3-pin D of LIGO standards).
  4. Needs voltage regulators inside for the power input.
  5. Metal film resistors. For the 5 Ohm resistors, we just parallel some 10 Ohm ones.

Electronics/LowNoiseFETamp (last edited 2012-01-03 23:03:06 by localhost)