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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 …

Artículos

• Descargar
  New Continuous-Time Lowpass Filters Feature Differential I/O, Linear Phase and Wide Dynamic Range &mdash LT Journal
  PDF, 151 Kb, Archivo publicado: feb 1, 2000
  Extracto del documento

  DESIGN INFORMATION New Continuous-Time Lowpass Filters
  Feature Differential I/O, Linear Phase
  and Wide Dynamic Range
  by Michael Kultgen and Nello Sevastopoulos DESIGN INFORMATION
  New Continuous-Time Lowpass
  Filters Feature Differential I/O,
  Linear Phase and Wide Dynamic
  Range . 32
  Michael Kultgen and Nello Sevastopoulos LTC1546 Multiprotocol Chip
  Simplifies NET1-, NET2-and TBR2Compliant Serial Interfaces
  . 33
  Dan Eddleman LTC2050, Zero-Drift Operational
  Amplifier in SOT-23 Package
  Minimizes Board Area without
  Compromising Specs . 34
  David Hutchinson +
  VIN
  –
  0.01µF 5 1 IN+ OUT+ 2 IN– 6
  OUT– LTC1565-31
  7
  3
  GND …

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Clasificación del fabricante

• Signal Conditioning > Filters > Lowpass Filters

Otros nombres:

LTC1565-31IS8PBF, LTC1565-31IS8 PBF, LTC156531IS8#PBF, LTC1565 31IS8#PBF