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:
Oct. 22, 2013
Filed:
Nov. 27, 2007
Joakim Bangs, Swindon, GB;
David Miles, Somerford Keynes, GB;
Joakim Bangs, Swindon, GB;
David Miles, Somerford Keynes, GB;
Broadcom Innovision Limited, Cambridge, GB;
Abstract
A near field RF communicator has an antenna circuit () to receive a modulated radio frequency signal by inductive coupling and demodulation circuitry (or) to extract the modulation from a received modulated radio frequency signal inductively coupled to the antenna circuit. The demodulation circuitry has a virtual earth input comprising a current mirror. The demodulation circuitry may be formed by an amplifier (or) and a demodulator () coupled to an output of the amplifier. The amplifier may be a single input amplifier () coupled to an output of the antenna circuit or may be a differential amplifier () having first and second inputs to receive the modulated radio frequency signal from first and second outputs of the antenna circuit, with each amplifier input providing a virtual earth input.