TLC04/MF4A-50, TLC14/MF4A-100

BUTTERWORTH FOURTH-ORDER LOW-PASS

SWITCHED-CAPACITOR FILTERS

SLAS021A – NOVEMBER 1986 – REVISED MARCH 1995

8

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

APPLICATION INFORMATION

f

clock +

1

RC

In

V

CC

–V

IT–

V

CC

–V

IT

)

V

IT

)

V

IT–

For VCC = 10 V

fclock =

1

1.69 RC

–5 V

5 V

4

VCC –

6

AGND

8

FILTER IN

FILTER

OUT

5

Butterworth

Fourth-Order

Low-Pass Filter

Nonoverlapping

Clock Generator

2

CLKR

1

CLKIN

3

LS

VCC+

7

Level Shift

φ1

φ2

Filter

Input

R

C

Filter

Output

Figure 5. Self-Clocking Through Schmitt-Trigger Oscillator Dual-Supply Operation