Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Patent
1997-02-05
1998-05-05
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
327306, 327178, 326 68, H03K 190185
Patent
active
057480265
ABSTRACT:
A level converting circuit for an input clock signal having a relatively low amplitude comprising a level converting circuit for converting the input clock signal to an output clock signal having a relatively high amplitude, the level converting circuit having an input transistor which has a predetermined threshold voltage, and detecting/offsetting circuit for detecting the threshold voltage of the input transistor and adding an offset voltage in response to the detected threshold voltage to the input clock signal and then for providing the offset input clock signal to the level converting circuit. The novel setup performs clock interfacing of a thin-film transistor integrated circuit device represented by an active-matrix liquid crystal display device at a relatively high speed at a low voltage below 3 V for example. This allows to fully cope with a recent trend of ever reducing operating voltage of a CMOS gate array constituting an external timing generator, eliminating necessity for building a pulse amplifier based especially on high dielectric-strength MOS process into the gate array to eventually reduce size of the chip.
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Hayashi Yuji
Maekawa Toshikazu
Callahan Timothy P.
Englund Terry L.
Sony Corporation
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