PMB2100 Просмотр технического описания (PDF) - Infineon Technologies

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PMB2100

GSM LO1 VCO

Infineon Technologies 

2.3

Functional Block Diagram

PMB 2100

Version 1.1

Functional Description

GND

VTUNE

GND

VCC

PD

Figure 2-2 Block Diagram

GND

OSW

OUTX

OUT

GND

PMB 2100

2.4

Functional Block Description

The PMB 2100 contains all circuits including resonators required for a LO1 VCO for a

dualband transceiver.

2.4.1 VCO core

Seperate VCO cores are used for the two frequency bands. The band required can be

selected with the OSW pin. Both VCOs have a common frequency control input VTUNE

and a common voltage supply pin VCC.

2.4.2 VCO Buffer

Seperate buffers are used for both cores to amplify the VCO signals. The Outputs are

combined into one output of the IC. A balanced Configuration is used for excellent even

harmonic suppression. The VCO can be connected to a chip out of the Infineon SMARTi

family with a minimum number of components.

Specification

11

2001-07-30

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