Differential Line Receiver

Figure 5 illustrates a Differential Line Receiver. The

circuit will convert differential signals to single-ended signals.

Figure 5: Differential Line Receiver

Bandpass Filter

Figure 6 illustrates a low-sensitivity bandpass filter and

design equations. This topology utilizes the CLC416’s

closely matched amplifiers to obtain low op-amp

sensitivity at high frequencies. The CLC405 is used as

a buffer to obtain low output impedance. The overall

circuit gain is unity. For additional gain, the CLC405

can be configured as a non-inverting amplifier.

To design the filter, choose C and then determine values

Figure 7 illustrates a bandpass filter with Q = 10 and

below:

R = 499

Ω

C = 330pF

Figure 6: Bandpass Filter Topology

Figure 7: Bandpass Response

Customer Design Applications Support

National Semiconductor is committed to design excellence. For sales, literature and technical support, call the

National Semiconductor Customer Response Group at 1-800-272-9959 or fax 1-800-737-7018.

Life Support Policy

National’s products are not authorized for use as critical components in life support devices or systems without the express written approval

of the president of National Semiconductor Corporation. As used herein:

1. Life support devices or systems are devices or systems which, a) are intended for surgical implant into the body, or b) support or

sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can

be reasonably expected to result in a significant injury to the user.

2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to

cause the failure of the life support device or system, or to affect its safety or effectiveness.

National Semiconductor

National Semiconductor

National Semiconductor

National Semiconductor

Corporation

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Japan Ltd.

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National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said

circuitry and specifications.

+

-

R

1/2

CLC416

+

-

CLC405

R

R

-

+

1/2

CLC416

R

C

C

R

1

2f C

RQR

r

1

==

π

Frequency (MHz)

0

-10

-40

1

10

-20

-30

1.8dB

935kHz

-

+

R

R

R

R

-

+

1/2

CLC416

1/2

CLC416

R

R

R

N

http://www.national.com

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