– 12 –

CXA1100/CXA1101/CXA1102/CXA1163

The MPX (multiplex) filter termination method shown in Fig. a-3 allows saving the coupling capacitors

between the buffer amplifiers and MPX filters. However, the channel to channel separation and REC to PB

crosstalk of low frequency signals will be degraded by the termination resistor RT. For example, 5k

will degrade the channel to channel separation to 50dB. Better separation can be obtained by increasing

5) Application for dubbing cassette decks

The CXA1100 series generates non decoded signal at the recoding output in the decode mode, and can

simplify the structure of dubbing decks. See the SONY' Dolby B/C type IC (CX20187/CXA1097Q or

CX20188/CXA1098Q) data sheet in detail.

Fig. a-3.

Switchable Processor with Single Supply

Note 1) Resistor and capacitor tolerances are ±10% and ±20% respectively unless otherwise specified.

Note 2) When resistors RT are connected to Pin 4 for the MPX filter termination, increase the capacitances of

2

3

13

14

15

4

1

16

C1

470µ

MPX

Filter

MPX

Filter

MPX

Filter

Buffer

MPX

Filter

MPX

Filter

MPX

Filter

Buffer

C11

4.7µ

C21

4.7µ

Line

Input

Line

Input

CXA1100 Series

3

4

5

6

7

8

10

11

12

14

15

1

C21

1µ

C22

1µ

NR

ON/OFF

ON

OFF

C24

4.7µ

LINE OUT

C23 (10%)

0.68µ

C14

4.7µ

LINE OUT

C13 (10%)

0.68µ

R1

(12

%)

43k

C3

10µ

C12

1µ

C11

1µ

PB IN

(–30dBm)

PB IN

(–30dBm)

REC IN

(–30dBm)

2

C2

100µ

C1

100µ

REC/PB

R2

10k

13

REC

PB

16

REC IN

(–30dBm)

C25

4.7µ

REC OUT

(–10dBm)

C15

4.7µ

REC OUT

∗

∗

9

∗

∗