This is the current mixer used in the Super Receiver. This mixer was inspired from the suggestion of Pascal Nguyen, from Australia. He presented this mixer as a term paper in a University he was attending. In an email Pascal said, "My suggestion is to replace the mixer with passive led type. Please find more information from US patent 6,111,452. It is a wideband gap SIC material, it means high mobility for electrons. Simply speaking it is a ring diode mixer with all diodes replaced by blue leds. I built this type of mixer in 1998 but only with red led to convert my 500 kHz to audio." In a follow up email he stated, "...it was designed for High IP3 and jamming warfare by the US forces. I like mixer, the idea of using more than 2 volt of oscillation to turn the led on and off occurred to me in 1998, but unfortunately the red led is able only on very low frequency, I did not have high speed led in that time." For a copy of Pascal's paper, download this .pdf file, Generika sortis. |