Abstract: During a recent consulting job to analyze acoustic telemetry signals transmitted by a deep-sea drill pipe, I was forced to investigate a process called digital envelope detection. This ...

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Abstract: This paper presents a power amplifier (PA) with an analog gate-tracking linearization circuit for wideband signals. A gallium nitride (GaN) monolithic microwave-integrated circuit (MMIC) PA ...

Learn how to make a cute crochet heart envelope keychain with this easy-to-follow tutorial. Perfect for beginners and crafters alike, this step-by-step guide shows how to create a charming, handmade ...

A closely watched clinical trial in Britain that screened blood for early detection of cancer did not show a reduction in diagnoses at later stages of the disease. By Rebecca Robbins and Gina Kolata A ...