5

P

3

5

P

8

7.5 10

Calculate R

C

7.5 10

Example: R

2.273k

3.3 10

-

-

-

´

=

´

=

=

´

1

2

0

4

2

R

Calculate R

R

9

8.06 10

Example : R

499

8456.56

9

=

-

´

=

-

=

4

0

8.06 10

Example: New R

498.8

8.058 20

´

=

=

´

1

0

V1

R

R

8.058 A

=

3

1

8

1

3.18 10

New R

81.54 k

3.9 10

Use R

80.6 k

-

-

´

=

=

´

=

3

1

1

3.18 10

R

C

-

´

=

LM833

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SLOS481B – JULY 2010 – REVISED OCTOBER 2014

Typical Application (continued)

(10)

Example: New C1 = 0.039 μF.

(11)

Calculate a new value for R0 from Equation 12.

(12)

(13)

Use R0 = 499.

(14)

Use R2 = 8.45 K.

Choose a convenient value for C3 in the range from 0.01 μF to 0.05 μF.

Example: C3 = 0.033 μF

(15)

Choose a standard value for R3 that is slightly larger than RP.

Example: R3 = 2.37 k

Calculate R6 from 1 / R6 = 1 / RP − 1 / R3

Example: R6 = 55.36 k

Use 54.9 k

Calculate C4 for low-frequency rolloff below 1 Hz from design Equation 5.

Example: C4 = 2 μF. Use a good quality mylar, polystyrene, or polypropylene.

Choose gain of second amplifier.

Example: The 1 kHz gain up to the input of the second amplifier is about 26 dB for this example. For an

overall 1 kHz gain equal to about 36 dB we choose:

AV2 = 10 dB = 3.16

Choose value for R4.

Example: R4 = 2 k

Calculate R5 = (AV2 − 1) R4

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