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  High Linearity Components Simplify Direct Conversion Receiver Designs &mdash DN418
  PDF, 73 Kb, 档案已发布: Jun 8, 2007
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  High Linearity Components Simplify Direct Conversion
  Receiver Designs – Design Note 418
  Cheng-Wei Pei
  Introduction
  A direct conversion radio receiver takes a high frequency
  input signal, often in the 800MHz to 3GHz frequency range,
  and utilizes one mixer/demodulator stage to convert the
  signal to baseband without going through an intermediate
  frequency (IF) stage. The resulting low frequency (baseband) signal spectrum has useful information at frequencies from DC to typically a few tens of MHz. Designing
  these receivers requires the use of very high performance
  analog ICs. High performance direct conversion radio
  receiver signal chains for applications such as cellular
  infrastructure and RFID readers require high linearity,
  low noise п¬Ѓgure (NF), and good matching between the
  in-phase and quadrature (I and Q) channels.
  The Right Components for the Job
  Linear Technology’s LT® 5575 direct conversion demodulator has a combination of excellent linearity and noise
  performance. The most important linearity specification
  for direct conversion mixers is the 2nd order intercept
  point (IIP2) due to the 2nd order distortion product falling
  within the baseband output spectrum, and the LT5575
  boasts 54.1dBm at 900MHz (60dBm at 1900MHz). The LT5575 also has high 3rd order linearity and a low noise
  п¬Ѓgure of 12.8dB. …

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  Using a Differential I/O Amplifier in Single-Ended Applications &mdash DN473
  PDF, 143 Kb, 档案已发布: Nov 11, 2009
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  Using a Differential I/O Amplifier in Single-Ended Applications
  Design Note DN473
  Glen Brisebois
  Introduction
  Recent advances in low voltage silicon germanium and
  BiCMOS processes have allowed the design and production
  of very high speed amplifiers. Because the processes are
  low voltage, most of the amplifier designs have incorporated
  differential inputs and outputs to regain and maximize total
  output signal swing. Since many low-voltage applications
  are single-ended, the questions arise, “How can I use a
  differential I/O amplifier in a single-ended application?”
  and “What are the implications of such use?” This Design
  Note addresses some of the practical implications and
  demonstrates specific single-ended applications using the
  3GHz gain-bandwidth LTCВ®6406 differential I/O amplifier.
  Background
  A conventional op amp has two differential inputs and an
  output. The gain is nominally infinite, but control is maintained by virtue of feedback from the output to the negative
  “inverting” input. The output does not go to infinity, but
  rather the differential input is kept to zero (divided by infinity,
  as it were). The utility, variety and beauty of conventional
  op amp applications are well documented, yet still appear …

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  Using a Differential I/O Amplifier in Single-Ended Applications &mdash LT Journal
  PDF, 291 Kb, 档案已发布: Dec 1, 2009
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  L DESIGN IDEAS Using a Differential I/O Amplifier
  in Single-Ended Applications
  by Glen Brisebois Introduction
  Recent advances in low voltage silicon
  germanium and BiCMOS processes
  have allowed the design and production of very high speed amplifiers.
  Because the processes are low voltage,
  most of the amplifier designs have
  incorporated differential inputs and
  outputs to regain and maximize total
  output signal swing. Since many low
  voltage applications are single-ended,
  the questions arise, “How can I use a
  differential I/O amplifier in a singleended application?” and “What are
  the implications of such use?” This
  article addresses some of the practical
  implications and demonstrates specific single-ended applications using
  the 3GHz gain-bandwidth LTC6406
  differential I/O amplifier. Background
  A conventional op amp has two differential inputs and an output. The
  gain is nominally infinite, but control is
  maintained by virtue of feedback from
  the output to the negative “inverting” …

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  Ultralow Power 16-Bit High Speed Signal Chain Solution for Portable Sampling Systems &mdash LT Journal
  PDF, 746 Kb, 档案已发布: Jul 15, 2011
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  Ultralow Power 16-Bit High Speed Signal Chain Solution for
  Portable Sampling Systems
  Clarence Mayott The LTC2195 family of ultralow power, dual 16-bit, 25Msps to 125Msps analog-to-digital
  converters (ADCs) dissipate half the power of competing 16-bit solutions, extending
  battery run times in portable electronics. Despite consuming only ~1.5mW/Msps per
  channel, the LTC2195 does not shirk performance to save power, yielding a 76.8dB
  signal-to-noise ratio (SNR) and 90dB of spurious free dynamic range (SFDR) at baseband (0MHz–62.5MHz, the first Nyquist zone). Serial LVDS outputs reduce the number
  of data lines required for routing the ADC data while minimizing digital feedback.
  SIGNAL PATH DESIGN The LTC2195 family is an ideal solution for applications that require 16-bit
  performance and ultralow power consumption to extend battery life. Portable
  medical imaging equipment is a perfect
  example. In many imaging applications
  the signal from the image sensor must
  be conditioned before being sampled by
  the ADC. For this task, it is important to
  choose a low noise, low power amplifier that matches the performance of the
  ADC, such as the LTC6406, which makes
  a good match for the LTC2195 family.
  The LTC6406 is a fully differential
  amplifier with low noise (1.6nV/в€љHz at
  the input) and high linearity (+44dBm
  OIP3 at 20MHz) in a small 3mm Г— 3mm QFN package. External resistors set the
  gain, giving the user maximum design …

模型线

制造商分类

• Signal Conditioning > Amplifiers > Operational Amplifiers (Op Amps) > High Speed Amplifiers (GBW > 50MHz) | Low Noise Amplifiers (
• Signal Conditioning > Amplifiers > Differential Amplifiers > Fully Differential Amplifiers

其他名称:

LTC6406IMS8EPBF, LTC6406IMS8E PBF