GB2234874B - Electronic surveillance systems. - Google Patents

Electronic surveillance systems.

Info

Publication number
GB2234874B
GB2234874B GB8125035A GB8125035A GB2234874B GB 2234874 B GB2234874 B GB 2234874B GB 8125035 A GB8125035 A GB 8125035A GB 8125035 A GB8125035 A GB 8125035A GB 2234874 B GB2234874 B GB 2234874B
Authority
GB
United Kingdom
Prior art keywords
surveillance systems
electronic surveillance
electronic
systems
surveillance
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 - Lifetime
Application number
GB8125035A
Other versions
GB2234874A (en
Inventor
Richard James Dewey
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Priority to GB8125035A priority Critical patent/GB2234874B/en
Publication of GB2234874A publication Critical patent/GB2234874A/en
Application granted granted Critical
Publication of GB2234874B publication Critical patent/GB2234874B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
GB8125035A 1981-08-17 1981-08-17 Electronic surveillance systems. Expired - Lifetime GB2234874B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8125035A GB2234874B (en) 1981-08-17 1981-08-17 Electronic surveillance systems.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8125035A GB2234874B (en) 1981-08-17 1981-08-17 Electronic surveillance systems.

Publications (2)

Publication Number Publication Date
GB2234874A GB2234874A (en) 1991-02-13
GB2234874B true GB2234874B (en) 1991-06-26

Family

ID=10523979

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8125035A Expired - Lifetime GB2234874B (en) 1981-08-17 1981-08-17 Electronic surveillance systems.

Country Status (1)

Country Link
GB (1) GB2234874B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7010443B2 (en) * 2003-10-31 2006-03-07 Agilent Technologies, Inc. Noise measurement system and method
SE542788C2 (en) * 2018-05-11 2020-07-07 Ew Labs Ab Method for increasing the instantaneous bandwidth of a digital receiver system with frequency coding
WO2021091444A1 (en) * 2019-11-08 2021-05-14 Ew Labs Ab Method to increase the bandwidth in a digital receiver system by the use of frequency coding
SE544648C2 (en) * 2020-09-08 2022-10-04 Anders Widman Method to double the bandwidth in a digital receiver system by the use of frequency and amplitude coding

Also Published As

Publication number Publication date
GB2234874A (en) 1991-02-13

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930817