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FR2848721A1
(fr)
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Transformateur a changement de mode selectif en frequences
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US3815012A
(en)
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Current transformer with active load termination for providing, inter alia, phase angle alteration
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KR100821422B1
(ko)
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평형 전송 종단 장치 및 그것을 이용한 수신 장치
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BE437316A
(enrdf_load_stackoverflow)
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US3582563A
(en)
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Apparatus for matching the impedance of a telephone set to a line
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US5038375A
(en)
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Circuit arrangement for preventing gain from responding to frequency variation despite the presence of an isolation transformer
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CA1157978A
(en)
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Loop sensing circuit for use with a subscriber loop interface circuit
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US3810247A
(en)
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Telephone set circuit
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US2286069A
(en)
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Telephone set circuit
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CA1267738A
(en)
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Telephone set comprising a line voltage stabilizer having a dc supply point
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JPS6042946A
(ja)
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適応線路ハイブリツド回路
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US1811947A
(en)
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Noise suppressing circuit
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US2775649A
(en)
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Telephone subscriber sets
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CH290147A
(fr)
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Poste téléphonique d'abonné.
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FR2657736A1
(fr)
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Circuit a resistance variable commandee en tension.
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US1654633A
(en)
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Recording system
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JP2002335193A
(ja)
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２線４線変換回路
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JP3616369B2
(ja)
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通信線の保安器
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JPH03289221A
(ja)
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擬似通信回路網
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US2318681A
(en)
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Telephone set
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GB2075798A
(en)
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Central office interface circuit
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US20080144808A1
(en)
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Circuit for adjusting impedance mismatch and method therefor
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US4899379A
(en)
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Circuit arrangement for the connection of line circuits of a digital time multiplex-telephone network
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US1755258A
(en)
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Battery-charging circuits
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US1654098A
(en)
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Electrical circuits
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