The document summarizes operational transconductance amplifiers (OTAs). It discusses how OTAs work as voltage controlled current sources and two-quadrant multipliers. The ideal OTA has infinite input impedance and converts the differential input voltage to a controlled current output. Real OTAs use circuitry to process input voltages over a wide range and produce a relatively output-independent current. Bipolar OTAs use a differential transistor pair to convert the input voltage difference to output current. Additional circuitry like input diode linearization can improve characteristics but reduces maximum transconductance.
This document discusses various online travel agencies and review sites and how hotel managers can respond to reviews on these platforms. It provides examples of positive reviews from TripAdvisor and Facebook for the Hyatt Regency DFW hotel and discusses metrics like the Customer Satisfaction Index used by TripAdvisor to rate reviews. It also briefly mentions policies on responses for Expedia, Hotels.com, Travelocity, Priceline and Booking.com.