Large-Area Balanced Photoreceivers
Frequency Response and Noise • 15
For the Model 2307 on the low setting the gain is
2x10
3
V/A and the bandwidth is 1 MHz. The gain on
the medium setting is 10
5
V/A, and the bandwidth is
200 kHz. The gain on the high setting is 2x10
6
V/A,
and the bandwidth is 150 kHz. The noise spectrum is
plotted in units of photocurrent noise, pA/
.
Figure 4:
Typical
frequency
response and
noise spectra
for the
Model 2307
Hz
Model 2307, Low Gain Setting
-35.0
-30.0
-25.0
-20.0
-15.0
-10.0
-5.0
0.0
5.0
0
200
400
600
800
1000 1200 1400
Frequency (kHz)
Frequency Response (dB)
1.E-11
1.E-10
1.E-09
1.E-08
1.E-07
Current Noise
(A_rms/sqrt(Hz))
Model 2307, Med Gain Setting
-35
-30
-25
-20
-15
-10
-5
0
5
0
100
200
300
400
Frequency (kHz)
Frequency Response (dB)
1.E-13
1.E-12
1.E-11
1.E-10
1.E-09
Current Noise
(A_rms/sqrt(Hz))
Model 2307, High Gain Setting
-35
-30
-25
-20
-15
-10
-5
0
5
0
100
200
300
400
Frequency (kHz)
Frequency Response (dB)
1.E-13
1.E-12
1.E-11
1.E-10
1.E-09
Current Noise
(A_rms/sqrt(Hz))
23x7 LA Blncd Rcvr revA.fm Page 15 Tuesday, September 28, 2004 1:59 AM