SA900 查看數據表（PDF） - Philips Electronics

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SA900

I/Q transmit modulator

Philips Electronics 

Philips Semiconductors

I/Q transmit modulator

Preliminary specification

SA900

XTAL_1

XTAL_2

C1

XO

CVAR

C2

Figure 7. Crystal Oscillator Configuration

SR00642

TXEN

DATA

CLOCK

STROBE

LSB

T1 T2 T3

MSB

T4

TRANSMIT ENABLED

SYN_EN

1

1

T1 + T2 + T3 + 3CLOCK , T4 + 3CLOCK

SYNTHESIZER ENABLED

Figure 8. Chip Timing Diagram

SR00643

VCC

100pF

1nF

L1

L2 1000pF

34

OR

SA900

TYPICAL VALUES

50Ω

L1 = 39nH

L2 = 22nH

SA900

VCC

L3

34

100pF

C1

TYPICAL VALUES

L3 = 12nH

C1 = 1.5pF

Figure 9. DUALTX Output Matching

1nF

50Ω

SR00644

1997 Sept 16

13

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