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:
Sep. 25, 2001
Filed:
Jun. 28, 1999
Hiroyuki Uesugi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An RF signal received from an antenna is supplied to an RF portion. The RF portion mixes down the RF signal to an IF signal. An RSSI circuit of an automatic gain controlling circuit portion converts the received RF signal into a DC component and detects the electric field intensity of the received signal. A level determining unit has two threshold values of the input level. The level determining unit controls the variable amount of a gain varying unit corresponding to the input level. An averaging process circuit averages a digital signal in a predetermined time period T and controls the variable amount of the gain varying unit,so that the average value converges at a digital value with n bits that represent a predetermined amplitude level. A BB portion demodulates the digital signal that has been modulated on the transmitting side to original information.