®

3656

9

Total amplifier gain:

Input Stage:

(Select G

demodulator output to 5V).

(Select to load input demodulator with at least 2M

Ω).

(Balance impedances seen by the + and – inputs

Output Stage:

R

(Balance impedances seen by the + and – inputs

of A

output offset).

(Load output demodulator equal to input demodulator).

Inverting Gain, Voltage or Current Input

The signal portion of Figure 4 shows two possible inverting

input stage configurations: current and input, and voltage

input.

Input Stage:

For the voltage input case:

to limit the demodulator output voltage to 5V).

R

(Select to load the demodulator with

at least 2M

Ω).

R

For the current input case:

V

capacitors are used to compensate for the input capacitance

Output Stage:

The output stage is the same as shown in equations (5), (6),

and (7).

(1)

(2)

(3)

(11)

(12)

(8)

FIGURE 4. Power: Two-Port, Single Supply; Signal: Inverting Gains.

(4)

R

R

(5)

(6)

(7)

(9)

R

R

(10)

D

D

M

I/P PWR

100k

Ω

+

–

0.47µF

0.47µF

–

+

19

20

10pF

R

R

V

IN

+

–

R

S

10pF

R

C

I

IN

V

OUT

7

4

6

9

2

10

15

11

13

17

16

12

O/P PWR

Pulse GEN

1

3

14

A

2

A

1