µPC8001

11

Figure 3-1.

Mixer Input

(a) 50

Ω Termination

(b) LC Matching

Note

The values L and C are affected by the parasitic capacitance and inductance of the board. Therefore,

adjust L and C so that the impedance at the MIX IN pin from the signal source equals 50

Ω.

Remark

The signal source impedance is 50

Ω.

Figure 3-2. Third Order Intercept

Remark

Signal source impedance is 50

Ω.

MIX IN1

107 nH

5 pF

0.01

µF

0.01

µF

50

Ω

14 MIX IN1

Note

Note

14

11

14

MIX IN1

MIX OUT

OSC IN

0.01

0.01

1.5 k

Ω

50

Ω

16.7

Ω

16.7

Ω

16.7

Ω

0.01

18 dB/OCT

6 dB/OCT

f = 130 MHz

9

Third order intercept

50

Ω

Measure 455 kHz component

level with spectrum analyzer