CXA2559 View Datasheet(PDF) - Sony Semiconductor

Part Name

Description

Manufacturer

CXA2559

Playback Equalizer Amplifier with Music Sensor

Sony Semiconductor 

Description of Operation

1. Signal route

The CXA2559Q signal circuit is shown in Fig. 1.

CXA2559Q

PB IN

FWD

RVS

MUTE OFF

24dB

MUTE ON

AMP1

300k

AMP2

7k/12k

MUTE OFF MUTE ON

100k

VGS

VGS

PBFB PBTC

PBOUT TAPEIN

(–30dBm)

LINEOUT

(–6dBm line amplifier

reference output level)

Fig. 1. Signal route block diagram

2. Gain adjustment method

Adjust the playback equalizer amplifier gain so that –6dBm is output on LINEOUT (Pins 7 and 24) by playing

back the reference tape for Dolby level adjustment.

By this adjustment, the output can be the same level as for the CXA2560Q and CXA2561Q which have the

built-in Dolby NR system.

Dolby level is defined as 200nWb/m measured according to the ANSI high efficiency head method.

Use the following reference tapes specified by Dolby Laboratories Licensing Corporation.

0

–10

–20

–30

–40

–50

–60

–70

–80

(dBm)

PBOUT

VR adjustment

–30dBm

TAPEIN

400Hz 200nWb/m: Dolby level reference tape

PBIN (HEAD)

Fig. 2. Level diagram

–6dBm

(Dolby level)

LINEOUT

List of Calibration Cassette Tape

1. A-bex Laboratories, Inc.

(part no. TCC-130)

2. BASF (product code 09797 XE)

3. Kaneon Corp.

(LC Engineering part no. LCT-7001)

4. Standard Tape Laboratory

(catalogue no. 28)

5. TEAC Corporation, Japan

(part no. MTT150)

6. TEAC Corporation of America

(part no. MTT150)

7. Victor Company of Japan, Ltd.

(part no. TMT-6130, VTT-727)

8. Sony Corporation (part no. TY-256)

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