BLW34 查看數據表（PDF） - Philips Electronics

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BLW34

UHF linear power transistor

Philips Electronics 

Philips Semiconductors

UHF linear power transistor

Product specification

BLW34

+Vs

D2

C4 R6

R1

D1

R2

TR1

C1

C2

R7

C3

R3

R8

R4

R5

+VCC

+VBB

R9

0

MGP437

Fig.10 Bias circuit for class-A linear amplifier at

fvision = 860 MHz.

List of components:

C1 = 100 pF ceramic capacitor

C2 = C3 = 100 nF polyester capacitor

C4 = 10 µF/25 V solid aluminium electrolytic capacitor

R1 = 150 Ω carbon resistor (0,25 W)

R2 = 100 Ω preset potentiometer (0,1 W)

R3 = 82 Ω carbon resistor (0,25 W)

R4 = R5 = 2,2 kΩ carbon resistor (0,25 W)

R6 = 2,8 Ω; parallel connection of

2 × 5,6 Ω carbon resistors (0,5 W each)

R7 = R8 = 820 Ω carbon resistor (0,25 W)

R9 = 33 Ω carbon resistor (0,25 W)

D1 = BZY88-C3V3

D2 = BY206

TR1 = BD136

−50

handbook, full pagewidth

dim

(dB)

MGP462

20

dcm

(%)

dim

−60

10

dcm

−70

0

2

0

4

Po sync (W)

6

Fig.11 Intermodulation distortion (dim)(1.) and cross-modulation distortion (dcm)(2.) as a function of output power.

Typical values; VCE = 25 V; IC = 600 mA; fvision = 860 MHz; − − − Th = 25 °C;  Th = 70 °C.

Information for wideband application from 470 to 860 MHz available on request.

1. Three-tone test method (vision carrier −8 dB, sound carrier −7 dB, sideband signal −16 dB), zero dB corresponds to

peak sync level.

Intermodulation distortion of input signal ≤ −75 dB.

2. Two-tone test method (vision carrier 0 dB, sound carrier −7 dB), zero dB corresponds to peak sync level.

Cross-modulation distortion (dcm) is the voltage variation (%) of sound carrier when vision carrier is switched from

0 dB to −20 dB.

August 1986

9

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