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The diamond buffer or diamond follower is a four-transistor, two-stage, push-pull, translinear emitter follower, or less commonly source follower, in which the input transistors are folded, or placed upside-down with respect to the output transistors. Like any unity buffer, the diamond buffer does not alter the phase and magnitude of input voltage signal; its primary purpose is to interface a high-impedance voltage source with a low-impedance, high-current load. Unlike the more common (a "double" in audio engineering terms), where each input transistor drives the output transistor of the same polarity, each input transistor of a diamond buffer drives the output transistor of the opposite polarity. When the transistors operate in close thermal contact, the input transistors stabilize the i

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rdfs:label
  • Diamond buffer (en)
  • Параллельный усилитель (ru)
rdfs:comment
  • The diamond buffer or diamond follower is a four-transistor, two-stage, push-pull, translinear emitter follower, or less commonly source follower, in which the input transistors are folded, or placed upside-down with respect to the output transistors. Like any unity buffer, the diamond buffer does not alter the phase and magnitude of input voltage signal; its primary purpose is to interface a high-impedance voltage source with a low-impedance, high-current load. Unlike the more common (a "double" in audio engineering terms), where each input transistor drives the output transistor of the same polarity, each input transistor of a diamond buffer drives the output transistor of the opposite polarity. When the transistors operate in close thermal contact, the input transistors stabilize the i (en)
  • Параллельный усилитель (ПУ) тока, реже «бриллиантовый» повторитель или буфер (калька с англ. diamond buffer) — четырёхтранзисторный комплементарный эмиттерный повторитель, в котором каждый из двух входных транзисторов управляет выходным транзистором противоположного типа проводимости. Эмиттерные переходы входного и управляемого им выходного транзистора включены навстречу друг другу, поэтому сдвиг напряжения между входом и выходом не превышает нескольких десятков мВ. ПУ не требует схемотехнических мер по тепловой стабилизации тока покоя: достаточно лишь обеспечить тепловую связь между транзисторами. Недостаток базовой схемы ПУ — жёсткое ограничение выходного тока — может быть исправлен либо её усложнением, либо повышением токов покоя входных транзисторов. (ru)
foaf:depiction
  • http://commons.wikimedia.org/wiki/Special:FilePath/Bootstrapped_diamond_follower.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Current_feedback_op_amp_Franco2002.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Dartzeel_diamond-follower_output_stage.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/PP_stage_complementary_diamond_follower_0_evolution.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/PP_stage_complementary_diamond_follower_2_Hybrid.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/PP_stage_complementary_diamond_follower_3.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/PP_stage_complementary_diamond_follower_5_inbetween_transistors.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/PP_stage_complementary_diamond_follower_6_cfp_output.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/PP_stage_complementary_diamond_follower_diode.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/The_original_LH0002_buffer_schematic.png
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  • center (en)
  • right (en)
caption
  • 0001-05-04 (xsd:gMonthDay)
  • Folded "diamond buffer Triple" for audio requires bias spreader for thermal regulation (en)
  • Diamond buffer with Sziklai output pairs (en)
  • Hybrid follower with high slew rate (en)
  • Each channel of the commercial Dartzeel audio power amplifier dissipates around 40 W idle power to be able to deliver 160 W through a simple four-transistor diamond (en)
  • Reverse diode arrangement improves current handling at the cost of high crossover distortion (en)
  • Bootstrapping emitters of T1, T3 increases maximum output current and voltage. Bootstrapping collectors as well removes the Early effect, and allows the use of low-voltage transistors in relatively high-voltage environments (en)
  • A simple current-feedback operational amplifier contains two diamond buffers . (en)
  • Hybrid follower with quasi-Darlington output transistors (en)
direction
  • horizontal (en)
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