BLF888_4

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© NXP B.V. 2010. All rights reserved.

Product data sheet

Rev. 04 — 29 April 2010

7 of 17

NXP Semiconductors

BLF888

UHF power LDMOS transistor

7.2.2 DVB-T

7.3 Impedance information

common source broadband test circuit as described in

Section 8.

common source broadband test circuit as described in

Section 8.

Fig 8.

DVB-T peak-to-average ratio and drain

efficiency as function of frequency;

typical values

Fig 9.

DVB-T power gain and intermodulation

distortion shoulder as a function of frequency;

typical values

f (MHz)

400

900

800

600

700

500

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7.5

6.5

8.5

9.5

PAR

(dB)

5.5

(%)

30

20

40

50

10

PAR

f (MHz)

400

900

800

600

700

500

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14

10

18

22

(dB)

6

(dB)

−30

−40

−20

−10

−50

Fig 10. Definition of transistor impedance

Table 8.

Typical push-pull impedance

f

MHz





300

1.018

 j1.350

5.565 + j0.747

325

1.045

 j1.022

5.435 + j0.752

350

1.076

 j0.722

5.303 + j0.746

375

1.110

 j0.444

5.167 + j0.730

400

1.148

 j0.183

5.030 + j0.704

425

1.190 + j0.064

4.892 + j0.668

450

1.238 + j0.299

4.754 + j0.622

475

1.291 + j0.526

4.617 + j0.567

500

1.351 + j0.746

4.481 + j0.504

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gate

drain