Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Having specific delay in producing output waveform
Patent
1997-08-11
1999-09-21
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Having specific delay in producing output waveform
327513, 327232, H03K 5159, H03H 1126
Patent
active
059559071
ABSTRACT:
A temperature compensation circuit for an IC device delay circuit compensates fluctuations of delay time in the IC device caused by temperature changes. The temperature compensation circuit accurately compensates the temperature even when there exist deviations of electrical characteristics in the circuit components in the IC device delay circuit, such as heat dissipation by a heater. The temperature compensation circuit includes a heater to generate heat to raise temperature of the IC device delay circuit when the heater is on, a flip-flop for turning the heater off when an input signal is provided to an input terminal of the IC device delay circuit and turns the heater on when the input signal returns to the flip-flop after a selected delay time, a plurality of delay elements each having a predetermined delay time for producing delayed signals, and a selector circuit for selecting one of the delayed signals from the delay elements.
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patent: 5768570 (1998-06-01), Kobayashi et al.
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Advantest Corp.
Callahan Timothy P.
Englund Terry L.
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