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:
Jan. 14, 2014
Filed:
Jan. 22, 2012
Roee Ben-yishay, Haifa, IL;
Roi Carmon, Nesher, IL;
Danny Elad, Moshav Liman, IL;
Oded Katz, Ganei-Tikva, IL;
Benny Sheinman, Haifa, IL;
Roee Ben-Yishay, Haifa, IL;
Roi Carmon, Nesher, IL;
Danny Elad, Moshav Liman, IL;
Oded Katz, Ganei-Tikva, IL;
Benny Sheinman, Haifa, IL;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A frequency quadrupler comprises a balanced topology which increases broadband odd harmonic suppression. The frequency quadrupler is constructed in a cascode configuration which is a two-stage amplifier composed of a transconductance amplifier followed by a current buffer. The cascode is constructed with common emitter (CE) and common base (CB) stages which further improves the multiplier frequency response. The cascode configuration enables a notch filter to be placed between the common emitter and common base stages to reduce 2harmonic generation and thereby increase 4harmonic output power, generation efficiency and conversion gain. To cancel 4harmonic components at the input that may destructively interfere with the output signal, capacitors are placed at the input of the common emitter stage, which in conjunction with the parasitic base wire inductance, form a notch filter to short the 4harmonic.