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Question about Temp Compensation

Discussion in 'Electronic Basics' started by K Wind, Sep 6, 2003.

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  1. K Wind

    K Wind Guest

    Is there a difference in the operation of Q1A and Q1B in the schematics
    shown below? I'm not sure if I've ever seen the collector connected to the
    base as shown in the circuit below, but have seen it somewhere. Why would
    someone choose not to connect the base and collector in some circuits, and
    in others have them connected? Does it increase the current capability when
    the collector is connected to the base?


    VCC VCC VCC VCC
    + + + +
    | | | |
    | |
    | | | |
    | .-. | .-.
    | | |LOAD | | |LOAD
    .-. | | .-. | |
    | |R1A '-' | |R1B '-'
    | | | | | |
    '-' | '-' |
    | | | |
    | | | |
    | |/ | |/
    +----------| Q2A ------+----| Q2B
    | |> | | |>
    | | | |/ |
    | | | ----| Q1B |
    | |/ .-. |> .-.
    ----| Q1A | |R2A | | |R2B
    |> | | | | |
    | '-' - D1B '-'
    | | ^ |
    - D1A | | |
    ^ === | ===
    | GND === GND
    | GND
    ===
    GND
    created by Andy´s ASCII-Circuit v1.24.140803 Beta www.tech-chat.de


    Regards,

    Ken
     
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