GB1265441A - - Google Patents

Info

Publication number
GB1265441A
GB1265441A GB1042070A GB1265441DA GB1265441A GB 1265441 A GB1265441 A GB 1265441A GB 1042070 A GB1042070 A GB 1042070A GB 1265441D A GB1265441D A GB 1265441DA GB 1265441 A GB1265441 A GB 1265441A
Authority
GB
United Kingdom
Prior art keywords
transistor
output
signal
amplifier
diode
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
Application number
GB1042070A
Other languages
English (en)
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 filed Critical
Publication of GB1265441A publication Critical patent/GB1265441A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
    • A01M29/16—Scaring or repelling devices, e.g. bird-scaring apparatus using sound waves
    • A01M29/18—Scaring or repelling devices, e.g. bird-scaring apparatus using sound waves using ultrasonic signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/36—Amplitude modulation by means of semiconductor device having at least three electrodes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Birds (AREA)
  • Engineering & Computer Science (AREA)
  • Insects & Arthropods (AREA)
  • Pest Control & Pesticides (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Amplifiers (AREA)
  • Measurement Of Current Or Voltage (AREA)
GB1042070A 1970-03-04 1970-03-04 Expired GB1265441A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1042070 1970-03-04
NL7003996A NL7003996A (fr) 1970-03-04 1970-03-20

Publications (1)

Publication Number Publication Date
GB1265441A true GB1265441A (fr) 1972-03-01

Family

ID=26247505

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1042070A Expired GB1265441A (fr) 1970-03-04 1970-03-04

Country Status (2)

Country Link
GB (1) GB1265441A (fr)
NL (1) NL7003996A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2445692A1 (fr) * 1979-01-05 1980-08-01 Badens Gerard Dispositif emetteur combine d'ultra-sons, destine a eloigner les petits animaux
WO1986002526A1 (fr) * 1984-10-26 1986-05-09 Hi-Tec Control Systems Pty. Ltd. Modulateur electronique de frequence
FR2775160A1 (fr) * 1998-02-23 1999-08-27 Sofi Ind Procede et dispositif pour repousser les rats et autres rongeurs
CN102356767A (zh) * 2011-09-15 2012-02-22 刘喆 电子式超声波驱鼠器

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2445692A1 (fr) * 1979-01-05 1980-08-01 Badens Gerard Dispositif emetteur combine d'ultra-sons, destine a eloigner les petits animaux
WO1986002526A1 (fr) * 1984-10-26 1986-05-09 Hi-Tec Control Systems Pty. Ltd. Modulateur electronique de frequence
FR2775160A1 (fr) * 1998-02-23 1999-08-27 Sofi Ind Procede et dispositif pour repousser les rats et autres rongeurs
CN102356767A (zh) * 2011-09-15 2012-02-22 刘喆 电子式超声波驱鼠器

Also Published As

Publication number Publication date
NL7003996A (fr) 1971-09-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees