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A standard push-pull driver (not shown) with a pull-up Darlington transistor pair utilizes separate (isolated) transistors plus a current-limiting resistor in the output device (Fig. 1).
English (United States)
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Integrated Darlington Pair
A standard push-pull driver (not shown) with a pull-up Darlington transistor
pair utilizes separate (isolated) transistors plus a current-limiting resistor in the
output device (Fig. 1).
The circuit of Fig. 1 has been implemented by integrating the Darlington pair
and current-limiting resistor within a common subcollector region (Fig. 2). The
current-limiting resistor is realized by the long narrow series resistance path
between the active collector of T2 (not shown) and the collector contact C.
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