SAMHOP Microelectronics Corp.

3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL

Figure 7

Figure 8

TOTAL HARMONIC DISTORTION + NOISE

VS.

OUTPUT POWER

VDD = 5.5 V

Load = 4 ohms

Gain = 20 dB

BTL Mode

20KHz

20 Hz

1 KHz

OUTPUT POWER (W)

TOTAL HARMONIC DISTORTION + NOISE

VS.

OUTPUT POWER

OUTPUT POWER (W)

Figure 8

20KHz

20 Hz

1 KHz

VDD = 5 V

Load = 8 ohms

Gain = 20 dB

BTL Mode

CLOSED LOOP RESPONSE

VDD = 5 V

Load = 8 ohms

Gain = 20 dB

Po = 1W

BTL Mode

Gain

Phase

FREQUENCY (Hz)

VDD = 5 V

Load = 8 ohms

Gain = 6 dB

Po = 1W

BTL Mode

CLOSED LOOP RESPONSE

Gain

Phase

FREQUENCY (Hz)

Figure 9

Figure 10

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V.0.1 Sep 12,2007