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Primary Texas Instruments application report SBOA001A, title-page byline Tamara Alani, January 2000–Revised June 2020: www.ti.com/lit/an/sboa001a/sboa001a.pdf?ts=1743415280108 . Printed pp. 2–3 explain preserving internal resistor matching while reducing differential gain; p. 5 describes observing the common-mode response on an oscilloscope and adjustment of rejection. The revision date is distinguished from the original report date.

Texas Instruments, TI Precision Labs. Title slide credits presentation and preparation to Tamara Alani. Presentation slides 3–5, PDF pages 3–5: a finite input impedance draws current from a source with nonzero output impedance; buffered inputs reduce this loading. Video landing page: www.ti.com/video/6216438746001 , dated 15 December 2020.