Abstract: A field-programmable object array integrated circuit employs a course gain architecture comprising a core array of highly optimized silicon objects that are individually programmed and synchronously connected via high performance parallel communications structures permitting the user to configure the device to implement a variety of very high performance algorithms. The high level functions available in the objects combined with the unique interconnect structures enables performance superior to existing field programmable solutions while maintaining and enhancing the flexibility. A consistent peripheral “donut” structure around the core of each object makes them interchangeable to build up complex circuits without redesign of standard objects.

Abstract: A variable gain amplifier is provided by including a gain control transistor with a differential amplifier. The differential amplifier has a first and second transistor each coupled to data inputs, which can receive a differential data signal. The gain control transistor is coupled between the drains of the first and second transistors. Control voltages are used to shunt differential current through the gain control transistor, providing variable gain with the maximum gain occurring when the control signals turn the gain control transistor off. A constant bias current is maintained by a pair of cascode transistors in parallel coupled to the sources of the first and second transistor.