Low-Noise, Regulated, -2V GaAsFET Bias
____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 2a, VIN = 3.6V, TA = +25°C, unless otherwise noted.)
40
VIN = 3.6V,
30
IOUT = 4mA
MAX840 NOISE SPECTRUM
(C1 = C2 = C3 = 1µF, C4 = 10µF)
20
10
0
-10
0.1
1
10
100
FREQUENCY (kHz)
1000
MAX840 NOISE SPECTRUM
(C1 = C2 = C3 = 0.22µF, C4 = 4.7µF)
50
VIN = 3.6V,
40
IOUT = 4mA
30
20
10
0
0.1
1
10
100
FREQUENCY (kHz)
1000
40
VIN = 3.6V,
30
IOUT = 4mA
MAX843/MAX844 NOISE SPECTRUM
(C1 = C2 = C3 = 1µF, C4 = 10µF)
20
10
0
NOTE: dBµV = 20 LOG _V_O_U__T_
1µV
-10
0.1
1
10
100
FREQUENCY (kHz)
1000
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