MOTOROLA

MC33111

6

Expander

f, FREQUENCY (Hz)

100

15

–40

20

100

25

1.0

1000

Vin, INPUT VOLTAGE (dB)

f, FREQUENCY (Hz)

Vin = 1.0 mVrms

Figure 5. Frequency Response (Compressor)

Figure 6. Frequency Response (Expander)

Figure 3. Transfer Characteristics

Vin, INPUT VOLTAGE (mVrms)

Figure 4. Transfer Characteristics

Compressor

Expander

0 dB = 100 mVrms

Vin = 10 mVrms

Vin = 100 mVrms

Vin = 1.0 Vrms

Vin = 316 mVrms

Vin = 100 mVrms

Vin = 31.6 mVrms

Vin = 10 mVrms

100

10

15

5.0

– 5.0

0

–20

5.0

0

– 5.0

–15

–25

–15

0

10

20

1000

10

100

– 20

0

20

1000

10k

100k

1000

10k

100k

1.0

–10

–35

–40

Compressor

Attack Time = Time to 1.5 x V1 from input increase.

Decay Time = Time to 0.75 x V2 from input decrease.

Test per EIA-553.

Output

(Pin 2)

Input

(Pin 3)

V1

90 mV

V2

360 mV

Figure 8. Attack and Decay Times (Expander)

Attack Time = Time to 0.57 x V1 from input increase.

Decay Time = Time to 1.5 x V2 from input decrease.

Test per EIA-553.

Output

(Pin 15)

Input

(Pin 14)

V1

100 mV

V2

200 mV

Figure 7. Attack and Decay Times (Compressor)