Ttl/cmos compatible input buffer
CA 1267196 C · Owner: Hsieh, Hung-Cheng · Inventors: Hsieh, Hung-Cheng
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hung-Cheng Hsieh ABSTRACT, A TTL/CMOS compatible input buffer includes an input inverter and a reference voltage generator. In the TTL mode, the reference voltage generator supplies a reference voltage to the source of the P-channel transistor in the inverter having a magnitude which forces the trigger point of the input inverter to assume a preselected value. Typically the preselected value is selected to be 1.4 volts in order to maximize the input noise margins. A second stage input inverter introduces hysterisis to improve the noise immunity of the system The reference voltage generator includes an operational amplifier connected to a voltage divider network. In the CMOS mode the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 27, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 27, 2007.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.