A Negative Impedance Repeater

Merrill, J. L.

doi:10.1109/t-aiee.1950.5060319

Trans. Am. Inst. Electr. Eng.

1950

DOI: 10.1109/t-aiee.1950.5060319

|View full text |Cite

A Negative Impedance Repeater

J. L. Merrill¹

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

1954

Publication Types

Select...

Article2

Relationship

Self Cite0

Independent2

Authors

Journals

Cited by 2 publications

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Negative Impedance Telephone Repeaters

Merrill¹,

Rose²,

Smethurst³

1954

Bell System Technical Journal

View full text Add to dashboard Cite

In the exchange telephone plant, speech is transmitted largely at voice frequencies over a single pair of wires that carries conversation in both directions. Until recently, adequate transmission was assured through a suitable choice of coil loading and conductor size. The need for voice frequency amplifiers had long been recognized, but wide use of the conventional hybrid type of repeater with separate amplifiers for conversation in the two directions had not been economic. In 1948, however, a new type of repeater was introduced that used the same source of gain for transmission in both directions, and did not require costly filters. This repeater is known as the E1 repeater. It operates as a negative impedance in the line. This paper describes the wide field of usefulness of two new types of negative impedance repeaters, the E2 and E3. Sufficient theory is‐given to show the advantages of using two types of negative impedance in a line, the series type and the shunt type, and how, by the addition of the shunt type to the series type, it is possible to insert gain without serious reactions on line impedance. The new equipment is described and maintenance features, together with methods of testing this relatively new type of repeater, are discussed.

show abstract

Negative Impedance Telephone Repeaters

Merrill¹,

Rose²,

Smethurst³

1954

Bell System Technical Journal

View full text Add to dashboard Cite

show abstract

Analysis of hunting phenomena in power systems by means of electrical analogues

Shen

Packer

1954

Proceedings of the IEE - Part II: Power Engineering

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

A Negative Impedance Repeater

Cited by 2 publications

References 2 publications

Negative Impedance Telephone Repeaters

Negative Impedance Telephone Repeaters

Analysis of hunting phenomena in power systems by means of electrical analogues

Contact Info

Product

Resources

About