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:
Nov. 19, 1996
Filed:
May. 16, 1995
Hiroshi Suzuki, Kawasaki, JP;
Masayoshi Shono, Kobe, JP;
Fujitsu Limited, , JP;
Fujitsu Ten Limited, , JP;
Abstract
A differential gain characteristic can be equivalently improved by providing a compensation circuit. The compensation circuit compensates a differential gain of a voltage-controlled oscillator, of which oscillating frequency is controlled by a control voltage. The compensation circuit comprises a first resistor which is connected to an input side of the voltage-controlled oscillator in series and a series circuit of a second resistor and a first diode, which is connected to the input side of the voltage-controlled oscillator in parallel, and further a first bias electric source for giving a bias voltage to the first diode in a forward direction. It becomes possible to make DG to be less than 5%, even if a modulator having a larger slope of characteristic, such as DG<50%.