Low-Frequency Cut-Off Filter

-30

-25

-20

-15

-10

-5

0

5

10

15

20

25

30

Frequency – Hz

-180

-135

-90

-45

0

45

90

135

180

10

100

1k

10k

100k

1M

TLV1012

To reduce noise on the output of the microphone, a low-cut filter is implemented in the TLV1012. This filter

reduces the effect of wind and handling noise.

It is also helpful to reduce the proximity effect in directional microphones. This effect occurs when the sound

source is very close to the microphone. The lower frequencies are amplified, which gives a bass sound. This

amplification can cause an overload, which results in a distortion of the signal.

Figure 6. Gain and Phase vs Frequency

The TLV1012 is optimized to be used in audio-band applications. The TLV1012 provides a flat gain response

within the audio band and offers linearity and excellent temperature stability.

8

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