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Экологический статус

Design Notes

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  A Precision Active Filter Block with Repeatable Performance to 10MHz &mdash DN324
  PDF, 75 Кб, Файл опубликован: 3 окт 2003
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  A Precision Active Filter Block with Repeatable
  Performance to 10MHz – Design Note 324
  Philip Karantzalis
  Introduction
  The increasing speeds and dynamic ranges of modern
  communication and control systems make for complex
  п¬Ѓlter requirements that have been, until now, a challenge
  to satisfy. Signal converters with high sampling rates
  can alleviate the need for selective п¬Ѓlters, but even so,
  some sort of band limiting is still required. Some wireless
  systems face yet another problem. Even though the use
  of oversampling converters has significantly simplified
  п¬Ѓltering, unexpected signals from neighboring systems
  can intrude on a converter’s allowed bandwidth.
  The LTВ®1568 requires only a few external components
  to satisfy complex п¬Ѓltering requirements, including
  band rejection. An important feature to note is that the
  performance of the LT1568 is precisely repeatable from
  device-to-device, making it possible to manufacture
  п¬Ѓlters in volume without the need for costly production trimming.
  Device Description
  The LT1568 is a dual second order matched building
  block which is useful in a variety of ways for different …

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  Baseband Circuits for an RFID Receiver &mdash DN381
  PDF, 76 Кб, Файл опубликован: 30 ноя 2005
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  advertisement Baseband Circuits for an RFID Receiver – Design Note 381
  Philip Karantzalis
  Introduction
  Radio Frequency Identification (RFID) technology uses
  radiated and reflected RF power to identify and track a
  variety of objects. A typical RFID system consists of a
  reader and a transponder (or tag). An RFID reader contains an RF transmitter, one or more antennas and an RF
  receiver. An RFID tag is simply an uniquely identified IC
  with an antenna.
  Communication between a reader and a tag is via backscatter reflection, similar to a radar system, in the UHF
  frequencies from 860MHz to 960MHz. This design note
  describes a high performance RFID receiver.
  A Direct Conversion Receiver
  Figure 1 shows the block diagram of a direct conversion
  RF receiver—the receiver demodulates an RF carrier
  directly into a baseband signal without an intermediate
  frequency down-conversion (a zero IF receiver).
  The antenna, shared by both the transmitter and receiver,
  detects an RF carrier and passes it through a bandpass
  filter to an LT® 5516 demodulator’s RF input.
  The LT5516 direct conversion demodulator frequency
  range of 800MHz to 1.5GHz includes the UHF range used RX
  ANTENNA LT5516 DEMODULATOR …

Модельный ряд

Классификация производителя

• Signal Conditioning > Filters > Filter Building Blocks

Варианты написания:

LT1568CGNPBF, LT1568CGN PBF