GB1368978A - Attenuator device - Google Patents

Attenuator device

Info

Publication number
GB1368978A
GB1368978A GB4129073A GB4129073A GB1368978A GB 1368978 A GB1368978 A GB 1368978A GB 4129073 A GB4129073 A GB 4129073A GB 4129073 A GB4129073 A GB 4129073A GB 1368978 A GB1368978 A GB 1368978A
Authority
GB
United Kingdom
Prior art keywords
input
attenuator
output
board
resistor
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
GB4129073A
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.)
Tektronix Inc
Original Assignee
Tektronix Inc
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 Tektronix Inc filed Critical Tektronix Inc
Priority to GB4129073A priority Critical patent/GB1368978A/en
Publication of GB1368978A publication Critical patent/GB1368978A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/22—Attenuating devices
    • H01P1/227—Strip line attenuators
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/24—Frequency- independent attenuators
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0237—High frequency adaptations
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/325—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by abutting or pinching, i.e. without alloying process; mechanical auxiliary parts therefor

Landscapes

  • Attenuators (AREA)

Abstract

1368978 Attenuators TEKTRONIX Inc 23 Dec 1971 [10 Feb 1971] 41290/73 Divided out of 1368977 Heading H3U [Also in Division H1] Attenuator apparatus comprises a plurality of attenuator devices of different attenuation value mounted on a circuit board and connected to conductive strips thereon and switch means comprising fixed contacts and movable contacts attached to the circuit board for selectively connecting the attenuator devices in cascade. The attenuator devices, 10, 12, 14 and 16, Fig. 2, are plugged into the circuit board 54 and make contact with a printed conductor on the upper surface of the board which together with ground planes on the upper surface forms a transmission line. A transmission line of similar impedance is formed on the lower surface of the board and ganged switches on the upper and lower surface of the board are operable to route the signal applied at the input 22 to any selected combination of the attenuator devices. The switches are operated by cams 28 on a shaft 26 rotated by a knob 38. The construction of the switches is described and claimed in Specifications 1,368,979 and 1,368,980 (see Division H1). A further shaft 30, surrounding the shaft 26 and rotated by an arm 40, carries cams 32 which operate further ganged switches on the top and bottom of the board to set up the input circuitry for A.C. or D.C. input and to ground the output of the attenuator. The attenuator devices, 10, 12, 14, 16 each comprise a distributed resistor extending between input and output, a resistor between the output and ground, a first conductor plane in parallel with the input end of the distributed resistor, a second conductor plane in parallel with the output end of the distributed resistor and a third conductor plane on the opposite side of the distributed resistor and in parallel with both input and output ends of the distributed resistor. The first and second planes are connected to input and output respectively to form a coupling capacitor therebetween. The capacitance of the conductor planes is sufficiently small for the shunt current to be less than 5% of the series current over the operating frequency range of the device.
GB4129073A 1971-02-10 1971-12-23 Attenuator device Expired GB1368978A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4129073A GB1368978A (en) 1971-02-10 1971-12-23 Attenuator device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11427371A 1971-02-10 1971-02-10
GB4129073A GB1368978A (en) 1971-02-10 1971-12-23 Attenuator device

Publications (1)

Publication Number Publication Date
GB1368978A true GB1368978A (en) 1974-10-02

Family

ID=26264641

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4129073A Expired GB1368978A (en) 1971-02-10 1971-12-23 Attenuator device

Country Status (1)

Country Link
GB (1) GB1368978A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172163A (en) * 1985-03-07 1986-09-10 Kenton Lab Limited Attenuator apparatus
GB2175764A (en) * 1985-06-01 1986-12-03 Crystalate Electronics Attenuator
GB2189959A (en) * 1986-04-24 1987-11-04 Kenton Lab Limited Attenuator apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172163A (en) * 1985-03-07 1986-09-10 Kenton Lab Limited Attenuator apparatus
GB2172163B (en) * 1985-03-07 1989-05-04 Kenton Lab Limited Attenuator apparatus
GB2175764A (en) * 1985-06-01 1986-12-03 Crystalate Electronics Attenuator
GB2189959A (en) * 1986-04-24 1987-11-04 Kenton Lab Limited Attenuator apparatus
GB2189959B (en) * 1986-04-24 1990-03-28 Kenton Lab Limited Attenuator apparatus

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Legal Events

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