GB2347290B - A buffer circuit for data signals - Google Patents

A buffer circuit for data signals

Info

Publication number
GB2347290B
GB2347290B GB0004208A GB0004208A GB2347290B GB 2347290 B GB2347290 B GB 2347290B GB 0004208 A GB0004208 A GB 0004208A GB 0004208 A GB0004208 A GB 0004208A GB 2347290 B GB2347290 B GB 2347290B
Authority
GB
United Kingdom
Prior art keywords
data signals
buffer circuit
buffer
circuit
signals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB0004208A
Other versions
GB2347290A (en
GB0004208D0 (en
Inventor
John Gildea
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hi Key Ltd
Original Assignee
Hi Key Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hi Key Ltd filed Critical Hi Key Ltd
Publication of GB0004208D0 publication Critical patent/GB0004208D0/en
Publication of GB2347290A publication Critical patent/GB2347290A/en
Application granted granted Critical
Publication of GB2347290B publication Critical patent/GB2347290B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/125—Discriminating pulses
    • H03K5/1252—Suppression or limitation of noise or interference
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
    • G07C2009/00365—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks in combination with a wake-up circuit
    • G07C2009/0038—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks in combination with a wake-up circuit whereby the wake-up circuit is situated in the keyless data carrier
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
    • G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
    • G07C2009/00793—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means by Hertzian waves
GB0004208A 1999-02-22 2000-02-22 A buffer circuit for data signals Expired - Fee Related GB2347290B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IE19990134A IES990134A2 (en) 1999-02-22 1999-02-22 A buffer circuit for data signals

Publications (3)

Publication Number Publication Date
GB0004208D0 GB0004208D0 (en) 2000-04-12
GB2347290A GB2347290A (en) 2000-08-30
GB2347290B true GB2347290B (en) 2003-06-25

Family

ID=11042007

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0004208A Expired - Fee Related GB2347290B (en) 1999-02-22 2000-02-22 A buffer circuit for data signals

Country Status (2)

Country Link
GB (1) GB2347290B (en)
IE (1) IES990134A2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB656565A (en) * 1946-01-03 1951-08-29 Us Commerce Improvements in or relating to pulse width discriminator circuits

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB656565A (en) * 1946-01-03 1951-08-29 Us Commerce Improvements in or relating to pulse width discriminator circuits

Also Published As

Publication number Publication date
IES990134A2 (en) 2000-10-18
GB2347290A (en) 2000-08-30
IE20000142A1 (en) 2000-11-01
GB0004208D0 (en) 2000-04-12

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20100222