The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 30, 1993
Filed:
Jul. 19, 1991
Applicant:
Inventor:
Arne Rydin, Snorpvadsgatan, SE;
Assignee:
Telefonaktiebolaget L M Ericsson, Stockholm, SE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H03F / ;
U.S. Cl.
CPC ...
2502 / ; 330 59 ;
Abstract
An input stage for an optical receiver with a photodiode (T), which has its output connected, via a capacitor (C.sub.1), to the input of a transimpedance amplifier (f), includes a unit having a resistance depending on the voltage, which is connected between the output of the photodiode and the earth potential of the amplifier. The photodiode is a PIN diode, and said unit with a voltage dependent resistance includes a feed-back amplifier (Df) with a frequency response adapted to that of the transimpedance amplifier.