11

®

OPA111

BW = 30kHz typ

GBW = 30.3MHz typ

∆V

* Theoretical performance achievable

from OPA111BM with uncorrelated

random distribution of parameters.

FIGURE 16. ‘N’ Stage Parallel-Input Amplifier for Reduced Relative Amplifier Noise at the Output.

FIGURE 14. RIAA Equalized Phono Preamplifier.

FIGURE 15. High Sensitivity (under 1nW) Fiber Optic

Receiver for 9600 Baud Manchester Data.

OPA111

2

3

6

<1pF to prevent peaking

200M

Ω

Pin Diode*

LM211

3

7

20k

Ω

0.1µF

1

10k

Ω

TTL

Output

+5VDC

Digital Common

Overload

≈ 0.1µW input

2

*Silicon Detector Corp.

SD-041-11-21-011

10k

Ω

10k

Ω

6

2

3

100

Ω

6

2

3

10k

Ω

6

2

3

10k

Ω

6

2

3

6

2

3

OPA111

OPA111

OPA111

OPA111

OPA111

6

2

3

OPA37

Output

N = 10 OPA111BM

Input

10k

Ω

100

Ω

10k

Ω

100

Ω

10k

Ω

100

Ω

10k

Ω

100

Ω

10k

Ω

10k

Ω

10k

Ω

OPA111

2

3

Output

0.03µF

R

T

C

T

10.5k

Ω

0.01µF

73.2k

Ω

1µF

365

Ω

0.01µF

6

100k

Ω

Input

365

Ω

G = 26dB

Midband