M65845AFP

REJ03F0170-0201 Rev.2.01 Jan 25, 2008

Page 9 of 13

4. Vocal cut

It is a method turned down Lch and Rch input having the same phase and sound.

Low pass cut off frequency fc is determined by a capacitance which connect to pin 36 (vocal cut filter).

It is also having a function which through frequency under vocal level for supplying a lack of low level sound.

36

C34

1

2

fc =

at fc = 50 Hz, C34 = 0.15

μF is determined.

Caution: Inside resistance is changeable one by one which rate is

±30%.

Digital Echo

1. Clock oscillator circuit

This IC incorporates a current control type clock oscillator circuit in it, thus providing circuit configuration just by

Fully internal clock supply prevents occurrence of undesired radiation without affecting any external circuit.

The oscillator frequency fck is following.

DC current

32

Clock

oscillator

circuit

Clock frequency: fck

Note: The delay time (Td) for echo is determined by the clock frequency (fck).

Delay time = 1/fck

× 24 × N

(N = the number of memory bits = 16384)

fck = 2 MHz (Rc = 51 k

Ω): Delay time = 197 ms

fck = 2.6 MHz (Rc = 39 k

Ω): Delay time = 150 ms

fck = 3.9 MHz (Rc = 24 k

Ω): Delay time = 100 ms