Abstract: Composite integrated circuits and methods for processing RF input signals are provided. A Bragg cell structure having a waveguide sample and a piezoelectric that may be used for surface acoustic waves is shown. The Bragg cell structure may be combined with other circuitry that may be produced from a monocrystalline-based material or from a compound semiconductor material in a composite integrated circuit. Such other circuitry may include an amplifier, a photoemitter, a photodetector array, an analog to digital converter, and a digital signal processor.

Abstract: A hybrid integrated circuit includes a monocrystalline accommodating layer positioned between a monocrystalline substrate and a compound semi-conductor layer. Electronic circuitry may be embedded in both the monocrystalline substrate and the compound semiconductor layer. Internal circuitry may be formed in either of these regions while an associated I/O structure is formed in the other region. Use of the invention allows circuits that are formed using either structure to easily communicate with external devices that are more suited for communication with circuits that are formed using another structure.

Abstract: A cascode current mirror circuit includes a cascode connected input stage (401) that operates to conduct an input current (400) in response to an input voltage of an input signal coupled to an effective transconductance of the cascode connected input stage (401). An input mirroring transistor (404) operates to control a mirror reference current (406) in response to the input voltage of the input signal. A diode connected transistor (409) coupled to a second control node of the cascode connected input stage (410) generates a control bias proportional to the mirror reference current (406) and to the input signal. A cascode connected output stage (411) has a first control node (413) coupled to the input signal and a second control node (414) coupled to the diode connected transistor (409) and the second control node (410) of the cascode connected input stage (401) for establishing an output current (415) that is substantially equivalent to the input current (400).