Abstract: A mixer may include a linearization circuit. The linearization circuit may include and operation amplifier, a first pass device, a second pass device, a first feedback resistor, and a second feedback resistor. Each of the first pass device and the second pass device may have a gate terminal, a first non-gate terminal, and a second non-gate terminal and coupled to its gate terminal to an output terminal of the operational amplifier and configured to be coupled at its first non-gate terminal to a high potential source. Each of the first feedback resistor and the second feedback resistor may have a first terminal and a second terminal, the first terminal coupled to the positive input terminal of the operational amplifier and the second terminal coupled to the second non-gate terminal of an associated pass device and the positive polarity of the differential baseband output.

Abstract: An interactive tutorial teaches an operator all of the required information needed to set up, operate, maintain, and troubleshoot a folding machine. The interactive tutorial includes graphic and text displays that provide all the necessary information to the operator or short videos to show exactly how an operation should be carried out. The tutorial preferably uses a touchscreen with buttons that allow the operator to select one from several displayed folder functions, see further information regarding a particular operation, or jump to another screen. In one embodiment, the displayed information in the tutorial is not used to control any functions of the folding machine and may include at least one of an operating manual, a maintenance procedure, and a troubleshooting operation.