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PMB2205

Features: • Direct modulation vector modulator• Linear modulating inputs• Symmetrical circuitry• Wide LO-frequency range 120 MHz to 800 MHz• LO operation alternatively at transmit frequency or double transmit frequency• Generation of orthogonal carriers within a...

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SeekIC No. : 004463943 Detail

PMB2205: Features: • Direct modulation vector modulator• Linear modulating inputs• Symmetrical circuitry• Wide LO-frequency range 120 MHz to 800 MHz• LO operation alternatively ...

PMB2205 Data Sheet

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Part Number:
PMB2205
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

• Direct modulation vector modulator
• Linear modulating inputs
• Symmetrical circuitry
• Wide LO-frequency range 120 MHz to 800 MHz
• LO operation alternatively at transmit frequency or double transmit frequency
• Generation of orthogonal carriers within a wide frequency range
• 35-dB carrier rejection, 42-dB SSB rejection
• 42-dB rejection of third order products
• 0-dBm linear output power
• Modulation frequency range 0 to 400 MHz
• Power-down mode
• P-DSO-20 or P-SSOP-20 package
• Temperature range 25 to 85


Application

• Vector modulated cellular and cordless systems:GSM, PCN, PCS, PDC, DAMPS, CDMA, WLAN, etc.
• Various modulation schemes, such as PM, PSK, FSK,QAM, QPSK, GMSK etc.
• Analog systems with FM- and AM modulation
• Space and power saving optimizations of existing discrete transmitter circuits


Description

The PMB 2205 is a direct quadrature modulator for use in mobile communication equipment.

An external LO signal f0 is fed to the modulator input. This signal of PMB2205 is first doubled and then bandpass filtered at 2f0. The filter may be realized by an external tank circuit. Alternatively,a local oscillator operating at 2f0 may be connected to the divider input. This signal of PMB2205 is the clock for a 2:1 divider. At the output of the divider orthogonal carriers are provided which are mixed with the baseband modulation signals by two multipliers. The outputs of the multipliers are added and amplified by a linear output stage.

The EN pin allows the modulator to be switched in power-down mode




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