TS4985

Application Information

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4.2

Gain in typical application schematic

The typical application schematic (

Figure 61) is shown on page 18.

In the flat region (no

For the second stage:

The differential output voltage is:

The differential gain, referred to as

terminal of the loudspeaker should be connected to

4.3

Low and high frequency response

In the low frequency region,

a -3dB cut-off frequency:

In the high frequency region, you can limit the bandwidth by adding a capacitor (

parallel with

The following graph (

V

out 1

V

–

in

()

R

feed

R

in

--------------

(V)

=

V

out 2

V

out1

–

2V

in

R

fee d

R

in

--------------

(V)

=

G

v

V

out2

V

out 1

–

V

in

-----------------------------------

2

R

feed

R

in

--------------

==

F

CL

1

2

πR

in

C

in

--------------------------

(Hz)

=

F

CH

1

2

πR

feed

C

fe ed

-------------------------------------

(Hz)

=

10

100

1000

10000

-25

-20

-15

-10

-5

0

5

10

Rin = Rfeed = 22k

Ω

Tamb = 25

°C

Cfeed = 2.2nF

Cfeed = 680pF

Cfeed = 330pF

Cin = 470nF

Cin = 82nF

Cin = 22nF

Frequency (Hz)