UPC8002GR Просмотр технического описания (PDF) - NEC => Renesas Technology

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UPC8002GR

SECOND MIXER + IF AMPLIFIER FOR DIGITAL CORDLESS TELEPHONES

NEC => Renesas Technology 

6. TEST METHODS

(1) Mixer input section

(a) With 50 Ω resistance termination

µPC8002

(b) With 50 Ω LC matching

470 pF

8

MIX IN1

VMIX

50 Ω

VMIX

CNote

LNote

470 pF

8

MIX IN1

Note

Since the values of L and C are affected by the board’s parasitic capacitance and inductance, L and

C should be adjusted so that the impedance looking at the MIX IN pin side from the signal source is

50 Ω.

(2) Third order intercept

MIX IN1

8

50 Ω

470 p

MIX OUT

2

82 pF

16.7 Ω

VMIX

16.7 Ω

16.7 Ω

f1 = 250.3 MHz

f2 = 250.6 MHz

LO IN

5

470 p

50 Ω

fOSC = 239.3 MHz

18

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