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:
Apr. 10, 2018
Filed:
Oct. 14, 2016
Analog Devices, Inc., Norwood, MA (US);
Alexandru Aurelian Ciubotaru, Somerset, NJ (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
An RF peak-detector circuit can operate over a wide range and can compensate or correct an output voltage error term that depends on the thermal voltage and the input signal voltage. At or near a minimum value of the input signal voltage range, such compensation can include a scaled base-emitter ratioing of bipolar junction transistors used to generate the output voltage, each of which can be biased by a primary current. At or near a maximum value of the input signal voltage range, this can include using an auxiliary bias current circuit that can shift auxiliary bias current between these bipolar junction transistors. The auxiliary bias current circuit can include scaled bipolar junction transistors in a cross-coupled configuration and an equivalent resistance circuit between emitters of the cross-coupled BJTs. This can provide a robust approach for improving the accuracy of an RF peak-detector circuit over a wide range.