MN3300 Series

1

MN3307

1024-Stage Ultra Low Voltage Operation BBD for Audio Signals

s Overview

The MN3307 is a 1024-stage ultra low voltage operation BBD

variable delay line in audio frequency range. The device operates on

+3 V supply and provides a signal delay up to 51.2 ms and is suitable

for use as reverberation effect of low voltage operation audio equip-

ment such as portable stereo, radio cassette recorder and microphone.

s Features

• Variable signal delay of the audio signal : 1.024 to 51.2 ms

• Wide range of supply voltage : 1.8 to 5.0 V

• No insertion loss : L

• Wide dynamic range : S/N=69 dB typ.

• Low distortion : THD=0.6 % typ. (V

• Clock frequency range : 10 to 200 kHz (1.8 V≤V

10 to 500 kHz (4.0 V

≤V

• N-channel 2-layer silicon gate process

• 8-Pin Dual-In-Line Plastic Package

s Applications

• Reverberation and echo effects of audio equipment such as radio

cassette recorder, car radio, portable radio, portable stereo, echo

microphone and Karaoke machine, etc.

• Sound effect of electronic musical instruments

• Variable or fixed delay of analog signals

DIP008-P-0300

Pin No. Symbol

Pin Name

Description

1

GND

Ground pin

Connected to ground.

2

CP2

Clock input 2

Basic clock pulse is applied to transfer electric charge of BBD.

3

IN

Signal input pin

Analog signal to be delayed is input. Most suitable DC bias should be applied to this pin.

Bias is applied to the gate of MOS transistor which is inserted in series with clock pulse

input gate of the BBD transfer gate.

Furthermore, voltage is supplied to step-up circuit.

The same phase clock pulse as CP1 is applied through capacitor.

6

CP1

Clock input 1

Clock pulse of inverted phase to CP2 is applied.

7

OUT

Output pin

Composed signal of 1024th and 1025th stages is output.

The same phase clock pulse as CP2 is applied through capacitor.

s Pin Descriptions

s Pin Assignment

1024-Stage

BBD

8

7

IN

3

OUT

5

s Block Diagram

1

2

MN3307

3

4

OUT

CP1

GND

CP2

IN

8

7

6

5