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Browse Prior Art Database

BROADBAND DC BIAS CIRCUIT FOR HIGH LINEARITY CELLULAR AMPLIFIERS

IP.com Disclosure Number: IPCOM000009850D
Original Publication Date: 2000-May-01
Included in the Prior Art Database: 2002-Sep-24
Document File: 1 page(s) / 57K

Publishing Venue

Motorola

Related People

Authors:
Glenn Watanabe Henry Lau Tom Schiltz

Abstract

A broadband DC bias circuit for high linearity cellular amplifiers is presented which has an IIP3 of +15dBm at 1.96GHz. CDMA specifications for the low noise amplifiers are very stringent with regards to the IP3. To achieve this, it is important to provide a low impedance at the difference frequency of the two-tone spacing for high llP3 and a large impedance at the high frequencies to preserve the noise figure and S parameters.