FOA3251B1

S1028C1

Functional Description

Data Sheet

10

V1.0, 1999-08

Figure 3

PFD Characteristic

The VCO is a LC type with a center frequency of 2.5 GHz. The measured tuning range

is shown in Figure 4.

Figure 4

Tuning Range LC VCO

The delay line is programmable in 8 steps of about 50 ps. The clock signal is adjustable

over 1 period (400 as) and can be easily adapted to different applications.

ITD11418

V

pfd

υ

e

-4

π

-2

π

2

π

4

π

K

-

K

ITD11419

0

2

Tuning Voltage

GHz

-1

-2

-3

V

m25 Center Freq. [GHz]

85 Center Freq. [GHz]

20 Center Freq. [GHz]

2.2

2.4

2.6

2.8

3