On May 15, 2014 MSI presented a technical paper at the Joint Armaments Forum, held in Phoenix, Arizona. The paper was titled Energy Harvesting IC for Illuminating Sights. This paper features the MSRFIF the Radio Frequency Interface Front End, a standard product IC from MSI. Here is the technical abstract from that paper:

One constant concern with newer optics on small arms is the need for batteries. Eliminating the batteries would increase the reliability of the system. Energy harvesting techniques would appear to be the best solution to removing the batteries. There are a number of energy harvesting products on the market. However, the Mixed Signal Radio Frequency Interface Front end is one of the few standard products that can work from low frequencies (60 Hz or less) up to 250 MHz. For eliminating batteries, a piezoelectric wafer provides a voltage that the MSRFIF's charge pump converts to a steady DC. Power output is limited by the amount of vibration the piezoelectric wafer generates. However, powering efficient LEDS is easily done with a minimum amount of vibration. This paper will present power output values and charge pump efficiency of this standard product.

This paper shows the MSRFIF powering low power LEDS to provide an illuminated red dot.

Here is the complete paper in PDF format.

On July 31, 2014, MSI presented a technical paper at the 57th annual fuze conference, held in Newark, New Jersey. The paper was titled Advantages of Analog Signal Processing over FPGA and DSP in Fuzing. This paper features the MSMXVHF High Frequency Mixer and Selectable Very High Frequency Lowpass/Bandpass Filter, the MSU2F1 Dual Resistor Programmable Universal Active Filter and the MSSPSI Smart Programmable Sensor Interface, all standard product ICs from MSI. Here is the technical abstract from that paper:

Although Field Programmable Gate Arrays and Digital Signal Processors are evolving into powerful system building blocks, Mixed Signal Analog Signal Processing remains superior. This paper will present the reasons for the superior nature of Analog Signal Processing. This will present the advantages of lower power for the same amount of signal processing needed, smaller package size availability, temperature stability and the ability to fit into smaller QFN and BGA packaging. Also, 24 bit dynamic range, thanks to a 12 Bit Analog to Digital Converter and a programmable gain block reduces the power and size of the complete system.

One alleged advantage of digitals signal processing is the ease of making changes. However, system design space is so tight; there is not room for external ROM or RAM. Code must be masked on the DSP. With staged wafers, changes to the analog signal processor can be turned around as quickly as a FPGA or DSP revision.

Here is the complete paper in PDF format.