MC34115 查看數據表（PDF） - Motorola => Freescale

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MC34115

CONTINUOUSLY VARIABLE SLOPE DELTA MODULATOR/DEMODULATOR

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MC34115

Continuously Variable Slope

Delta Modulator/Demodulator

Providing a simplified approach to digital speech encoding/decoding, the

MC34115 CVSD is designed for speech synthesis and commercial telephone

applications. A single IC provides both encoding and decoding functions.

• Encode and Decode Functions Selectable with a Digital Input

• Utilization of Compatible I2L – Linear Bipolar Technology

• CMOS Compatible Digital Output

• Digital Input Threshold Selectable (VCC/2 Reference Provided On–Chip)

• 3–Bit Algorithm

CONTINUOUSLY VARIABLE

SLOPE DELTA

MODULATOR/DEMODULATOR

SEMICONDUCTOR

TECHNICAL DATA

16

1

P SUFFIX

PLASTIC PACKAGE

CASE 648

CVSD Block Diagram

Encode/Decode

Clock

15

14

Analog Input 1

–

Analog 2

Feedback

+

Digital 13

Data Input

–

+

Digital 12

Threshold

Vth

3–Bit

Shift Register

QQQQQQ

VCC

16

9

Digital Output

10

VCC/2 Output

VCC/2

Ref

IRef

IO

Integrator

Amplifier

–

+

Logic

Slope

Polarity

Switch

IInt

11 Coincidence

Output

V/I

Converter

3 Syllabic Filter

4 Gain Control

IGC

7

56

8

Analog Ref Filter

VEE

Output Input Input

(+)

(–)

This device contains 144 active transistors.

16

1

DW SUFFIX

PLASTIC PACKAGE

CASE 751G

(SO–16L)

PIN CONNECTIONS

Analog Input (–) 1

Analog Feedback (+) 2

Syllabic Filter 3

Gain Control 4

Ref Input (+) 5

Filter Input (–) 6

Analog Output 7

VEE 8

16 VCC

15 Encode/Decode

14 Clock

13 Digital Data Input (–)

12 Digital Threshold

11 Coincidence Output

10 VCC/2 Output

9 Digital Output

(Top View)

ORDERING INFORMATION

Device

Operating

Temperature Range

Package

MC34115P

TA = 0° to +70°C

MC34115DW

Plastic DIP

SO–16L

MOTOROLA ANALOG IC DEVICE DATA

© Motorola, Inc. 1996

Rev 1

1

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