INTERGER RF/IF DUAL PLL

S1M8821/22/23

19

RF SENSITIVITY MEASUREMENT CIRCUIT

RF

Signal

Generator

Frequency

Counter

PC

Parallel

Port

50

Ω

Microstrip

100pF

51

Ω

100pF

12k

Ω

39k

Ω

foLD

2.7V to 4.0V

LE

DATA

CLOCK

100pF

100pF

2.2

µF

2.2

µF

** N=10,000 R=50 P=64

** Sensitivity limit is determined when the error of the divided RF output( foLD) becomes

≥ 1 Hz.

10dB ATTN