CMX602BD4 MX-COM, Inc., CMX602BD4 Datasheet - Page 7

• Manufacturer Part Number: CMX602BD4
• Description: Calling line identifier plus call waiting
• Manufacturer: MX-COM, Inc.

Calling Line Identifier plus Call Waiting (Type II)
The Input Signal Amplifier may also be used to allow the CMX602B to operate from an unbalanced signal
source as shown in Figure 4. In this unbalanced signal configuration, the values of R6 and R8 are the same
as used for the balanced input configuration.
4.3 Bandpass Filter
The Bandpass Filter is used to attenuate out of band noise and interfering signals from reaching the FSK
Demodulator, Tone Alert Detector and Level Detector circuits. The characteristics of this filter differ between
FSK and Tone Alert modes. Switched Capacitor filter stages clocked at 57.7kHz provide primary filtering. If
the input signal is band limited to below 28.85kHz then external anti-aliasing filtering is not required.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201, USA
2000 MX-COM, Inc
1000
900
800
700
600
500
400
300
200
100
0
3
Figure 5: Input Signal Amplifier, Optimum Values of R8 and R9 vs. V
Figure 4: Input Signal Amplifier, unbalanced input configuration
A
www.mxcom.com Tel: [phone] 744 5050 Fax: [phone]
C6
3.5
R6
R8
AMPOUT
Nominal V
V
IN+
7
IN-
All trademarks and service marks are held by their respective companies.
SS
R8
4
Input Signal Amplifier
DD
+
-
R9
CMX602B PRELIMINARY INFORMATION
4.5
V
BIAS
C9
DD
Doc. # 20480204.002
5