5

4733B–RKE–09/05

U2741B

5.

Application Circuit

The following component values are recommendations for a typical application. C

are block capacitors. The values of these capacitors depend on the board layout. C

C

and f = 1 GHz should be as low as possible.

C

way that the desired transmission frequency deviation is achieved (typical ±30 kHz). The capac-

itance here depends upon the crystal's load capacity (C

the crystal. C

C

the appropriate impedance transformation is possible.

L

can be either printed on the PC board or be a discrete component.

5.1

Output Power Measurement

The output network [as shown in Figure 5-1] can be used for output power evaluation, the exact

values of L

L

Table 5-1 shows the values for an output power of 2 mW and an R

Figure 5-1.

Measurement Output Network

Table 5-1.

Transformation Network

f/MHz

C10/pF

L10/nH

315

2.7

56

260 + j330

433.92

1.8

33

185 + j268

PWRVCC

ANT

V

S

L

10

C

10

50

Ω

Z

Load-opt