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Notas de aplicación

• Descargar
  Interfacing RF I/Q Modulators with Popular D/A Converters &mdash AN109
  PDF, 151 Kb, Archivo publicado: marzo 23, 2007
  Linear Technology’s High Frequency Product lineupincludes a variety of RF I/Q modulators. The purpose ofthis application note is to illustrate the circuits requiredto interface these modulators with several popular D/Aconverters. Such circuits typically are required to maximizethe voltage transfer from the DAC to the baseband inputsof the modulator, as well as provide some reconstruction filtering.
  Extracto del documento

  Application Note 109
  March 2007
  Interfacing RF I/Q Modulators with
  Popular D/A Converters
  Doug Stuetzle
  Introduction
  Linear Technology’s High Frequency Product lineup
  includes a variety of RF I/Q modulators. The purpose of
  this application note is to illustrate the circuits required
  to interface these modulators with several popular D/A
  converters. Such circuits typically are required to maximize
  the voltage transfer from the DAC to the baseband inputs
  of the modulator, as well as provide some reconstruction
  п¬Ѓltering. 0.52V. If the common mode DC voltage applied to the
  modulator’s baseband input terminals deviates from
  this value by more than about 75mV, the device may
  not meet the specifications listed in the data sheet,
  because source voltage affects the current consumed
  by the mixer core. The common mode voltage is approximately constant over temperature. High impedance, lower common mode DC voltage
  (LT5571, LT5572) The baseband (I,Q) interface for the modulators falls into
  one of three categories: The baseband input circuit of these modulators presents
  a very high differential impedance (about 90k). The
  I, Q inputs do not generate an internal DC voltage, but …

Notas de Diseño

• Descargar
  High Frequency Active Antialiasing Filters &mdash DN313
  PDF, 161 Kb, Archivo publicado: jun 1, 2003
  Extracto del documento

  High Frequency Active Antialiasing Filters – Design Note 313
  Philip Karantzalis
  Introduction
  High frequency (1MHz or higher) active lowpass filters
  are now practical alternatives to passive LC filters mainly
  due to the availability of very high bandwidth (100MHz or
  higher) integrated amplifiers. Analog signal filtering applications with bandwidths in the megahertz region can
  be implemented by a discrete active filter circuit using
  resistors, capacitors and a 400MHz operational amplifier
  such as the LTВ®1819 or the LT6600-10, a fully integrated
  lowpass filter. The LT6600-10 has a fixed 10MHz frequency
  response equivalent to a fourth order flat passband Chebyshev function. An LT1819-based active RC lowpass
  filter can be designed to have a Chebyshev, Butterworth,
  Bessel or custom frequency response (up to 20MHz).
  The LT6600-10 Lowpass Filter
  The LT6600-10 is a fully integrated, differential, fourth
  order lowpass filter in a surface mount SO-8 package
  (Figure 1). Two external resistors ranging from 1600О© to
  100Ω set the differential gain in the filter’s passband from
  –12dB to 12dB, respectively. The LT6600-10 passband
  gain ripple is a maximum of 0.7dB to –0.3dB up to 10MHz
  and attenuation is typically 28dB at 30MHz and 44dB at
  50MHz. The signal to noise ratio (SNR) at the filter’s output …

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Clasificación del fabricante

• Signal Conditioning > Amplifiers > Differential Amplifiers > Fully Differential Amplifiers
• Signal Conditioning > Filters > Wideband Active Filters

Otros nombres:

LT6600IDF-10TRPBF, LT6600IDF-10 TRPBF, LT6600IDF10#TRPBF, LT6600IDF 10#TRPBF