APPLICATION NOTE
Wide-band linear power amplifiers (470 − 860 MHz) with the transistors BLW32 and BLW33
ECO7806
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w
...
APPLICATION NOTE
Wide-band linear power amplifiers (470 − 860 MHz) with the
transistors BLW32 and BLW33
ECO7806
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w
w
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U 4 t e
.c
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Philips Semiconductors
Wide-band linear power amplifiers (470 − 860 MHz) with the
transistors BLW32 and BLW33
CONTENTS 1 2 3 3.1 3.2 3.3 4 4.1 4.2 4.3 5 5.1 5.2 6 7 8 9 9.1 9.2 10 10.1 ABSTRACT INTRODUCTION THEORETICAL CONSIDERATIONS The equivalent circuit of the
transistor input and output of the BLW32 and BLW33 The output networks The input networks THE SINGLE AMPLIFIERS WITH BLW32 AND BLW33 Practical considerations Practical optimization method Measured results COMBINED AMPLIFIER WITH BLW32 AND BLW33 Practical considerations Measured results CONCLUSIONS REFERENCES RECOMMENDATIONS LIST OF COMPONENTS BLW32 amplifiers BLW33 AMPLIFIER PRINTED-CIRCUIT BOARDS 1/16 INCH PFTE DOUBLE CU CLAD BLW32 AND BLW33 AMPLIFIERS
Application Note ECO7806
1998 mar 23
2
Philips Semiconductors
Wide-band linear power amplifiers (470 − 860 MHz) with the
transistors BLW32 and BLW33
1 ABSTRACT
Application Note ECO7806
For application in T.V. transposers for band IV/V (470 − 860 MHz) some wideband linear power amplifiers have been made with the BLW32 and BLW33. A single stage amplifier with BLW32 gave a minimum output power of 380 mW peak sync. at a 2-tone i.m.d. of −47 dB. The power gain was 11.4 ±0.55 dB. A similar amplifier with the BLW33 produced a minimum output of 790 mW peak sync. at the ...