• This catalog has only typical specifications because there is no space for detailed specifications. Therefore, please review our product specifications or consult the approval sheet for product specifications before ordering.

C31E.pdf

Mar.28,2011

74

Frequency (MHz)

30

300

50

100

150

200

250

45

85

50

55

60

65

70

75

80

Frequency (MHz)

30

300

50

100

150

200

250

45

85

50

55

60

65

70

75

80

Frequency (MHz)

30

300

50

100

150

200

250

45

85

50

55

60

65

70

75

80

AC04

AC00

1MHz

Measuring Circuits

Filter

Measuring Point

Waveform Distortion Suppressing

Performance of BLMppR Series

Type of Filter

EMI Suppression Effect / Description

Initial

(No filter)

Resister (47

Ω)

is used

BLM18RK221SN1

(220

Ω at 100MHz)

is used

Ringing is caused on the signal waveform.

Such ringing contains several hundred MHz harmonic components and generates noise.

Signal waveform (100nsec/div, 2V/div)

Expand (10nsec/div, 2V/div)

Spectrum

Comparing initial waveform, ringing is suppressed a little.

However there still remains high level waveform distortion.

Signal waveform (100nsec/div, 2V/div)

Expand (10nsec/div, 2V/div)

Spectrum

BLM18R has excellent performance for noise suppression and waveform distortion suppression.

BLM18R suppresses drastically not only spectrum level in more than 100MHz range but waveform distortion.

Signal waveform (100nsec/div, 2V/div)

Expand (10nsec/div, 2V/div)

Spectrum

EMI

Suppression

Effect

BLMppR Series