Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Current driver
Patent
1994-11-02
1995-11-21
Heyman, John S.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Current driver
327103, 330295, 330299, 330311, H03B 100
Patent
active
054690935
ABSTRACT:
A drive circuit comprises a plurality of current mirrors connected in series at their output-current end with a load resistor between two power rails. The input halves of the mirrors are driven by respective groups of series-connected input transistors, the lowest transistor in each group serving to set up the required currents in the mirrors in response to an input voltage on its base. Two potential dividers set up potentials on the control terminals of the groups of input transistors, on the one hand, and potentials on the main-terminal junctions of the mirror output transistors, on the other, such that at no time does any transistor in the circuit experience a voltage greater than its rated voltage.
Heyman John S.
Plessey Semiconductors Limited
Zweizig Jeffrey
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