PDF《BLF861A》

19 L14

50 ? input L3 L1 C1 L2 B1 L4 L5 R5 R4 L6 L8 C15 L17 C11 C20 C22 C26 C25 C19 C18 L18 C21 C23 C24 C12 C13 L13 L15 L16 B2 C14 C2 C3 C4 C16 C17 C7 C6 C9 C8 C10

50 ? output +VS +Vbias R3 R2 R6 MCD876 Fig.8 Class-AB common source broadband test circuit.

2001 Feb

09 7 Philips Semiconductors Product speci?cation UHF power LDMOS transistor BLF861A List of components class-AB broadband test circuit (see Figs

8 and 9) COMPONENT DESCRIPTION VALUE DIMENSIONS CATALOGUE No. C1 multilayer ceramic chip capacitor;

note

1 20 pF C2 multilayer ceramic chip capacitor;

note

1 4.3 pF C3, C6, C9 tekelec trimmer 0.6 to 4.5 pF C4 multilayer ceramic chip capacitor;

note

1 9.1 pF C5 multilayer ceramic chip capacitor;

note

1 10 pF C7 multilayer ceramic chip capacitor;

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1 5.1 pF C8 multilayer ceramic chip capacitor;

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1 13 pF C10, C11 multilayer ceramic chip capacitor;

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2 8.2 pF C12, C13 multilayer ceramic chip capacitor;

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2 6.8 pF C14 multilayer ceramic chip capacitor;

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3 1 pF C15 multilayer ceramic chip capacitor;

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3 20 pF C16, C17 multilayer ceramic chip capacitor

1 nF C18 multilayer ceramic chip capacitor

100 nF C19, C26 multilayer ceramic chip capacitor

100 ?F C20, C21, C22, C23 multilayer ceramic chip capacitor;

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2 100 pF C24 electrolytic capacitor

1000 ?F C25 multilayer ceramic chip capacitor

1 ?F

2222 595

16754 L1, L2 stripline;

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4 30.6 * 2.4 mm L3, L4 stripline;

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4 28 * 2.4 mm L5, L6 stripline;

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4 10 *

5 mm L7, L8 stripline;

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4 20 *

10 mm L9, L10 stripline;

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4 5.5 *

15 mm L11, L12 stripline;

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4 10 *

10 mm L13, L14 stripline;

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4 15 *

5 mm L15, L16 stripline;

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4 48.5 * 2.4 mm L17 stripline;

note

4 10 * 2.4 mm L18 ferrite L19 wire inductor (hairpin) length =

17 mm B1 semi rigid coax balun UT70-25 Z =

25 ? ±1.5 ?

70 mm B2 semi rigid coax balun UT70-25 Z =

25 ? ±1.5 ? 48.5 mm

2001 Feb

09 8 Philips Semiconductors Product speci?cation UHF power LDMOS transistor BLF861A Notes 1. American Technical Ceramics type 100A or capacitor of same quality. 2. American Technical Ceramics type 180R or capacitor of same quality. 3. American Technical Ceramics type 100B or capacitor of same quality. 4. The striplines are on a double copper-clad printed-circuit board: Rogers

5880 (εr = 2.2);

thickness 0.79 mm. R1 r........