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:
Jul. 09, 2019
Filed:
Jan. 07, 2019
Skyworks Solutions, Inc., Woburn, MA (US);
Mackenzie Brian Cook, Montreal, CA;
Skyworks Solutions, Inc., Woburn, MA (US);
Abstract
Apparatus and methods for front-end systems with reactive loopback are provided. In certain configurations, a front-end system includes an antenna port, a transmit port operable to receive a transmit signal, a receive port, an antenna switch, a back switch, a transmit port DC blocking capacitor coupled between a first end of the antenna switch and the transmit port, an antenna port DC blocking capacitor coupled between a second end of the antenna switch and the antenna port, a receive port DC blocking capacitor coupled between a first end of the back switch and the receive port, and a reactive loopback impedance coupled between a second end of the back switch and the first end of the antenna switch. The reactive loopback impedance provides a portion of the transmit signal to the receive port when the back switch is activated.