PMB2341 데이터 시트보기 (PDF) - Infineon Technologies

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PMB2341

10-pin Single PLL

Infineon Technologies 

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PMB 2341

preliminary

Functional Description

3.4 Functional Blocks

3.4.1 General information

The PMB2341 consists of a dual band single PLL. The device is designed to work in

mobile communication systems and can handle VCO input frequencies up to 2.5 GHz.

3.4.2 PLL

The PLL in the PMB 2341 consists of a high frequency bipolar configurable 32/33 or 64/

65 dual modulus prescaler, an A- and a N-counter with dual modulus control logic, a

reference- (R-) counter, and a phase detector with charge pump output with

programmable output current drive capability. The counter and mode settings of the

synthesizer are programmed via a serial 3-wire interface.

The reference frequency is applied at the RI-input and divided by the PLL’s R-counter.

Its maximum value is specified to be 100 MHz. The VCO’s RF input signal is divided by

the bipolar prescaler with a programmable 32/33 or 64/65 divider ratio and the following

programmable A/N-counters. For a wide range of divider ratios, both N and R counter

can be programmed from 3 to 4095 .

The phase and frequency detectors with the charge pumps have a linear operating range

without dead zone for very small phase deviations.

The operating modes allow the selection of 4 different charge pump output currents,

polarity setting of the phase detector, 2 standby modes and the conrol of the multi-

functional output port MFO.

Wireless Components

3-4

Specification, February 2000

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