Abstract: Local oscillator (LO) leakage and Image are common and undesirable effects in typical transmitters. Typically, fairly complex hardware and algorithms are used to calibrate and reduce these impairments. A single transistor that draws essentially no dc current and occupies a very small area detects the LO leakage and Image signals. The single transistor operating as a square-law device is used to mix the signals at the input and output ports of a power amplifier. The mixed signal generated by the single transistor enables the simultaneous calibration of the LO leakage and Image Rejection.

Abstract: Local oscillator (LO) leakage and Image are common and undesirable effects in typical transmitters. Typically, fairly complex hardware and algorithms are used to calibrate and reduce these impairments. A single transistor that draws essentially no dc current and occupies a very small area detects the LO leakage and Image signals. The single transistor operating as a square-law device is used to mix the signals at the input and output ports of a power amplifier. The mixed signal generated by the single transistor enables the simultaneous calibration of the LO leakage and Image Rejection.

Abstract: An apparatus and method are provided for controlling the gain of a common source differential amplifier. The common source differential amplifier includes a pair of a metal-oxide-semiconductor field effect transistors (MOSFETs) each including a gate, a drain, and a source and at least one common source degeneration MOSFET in electrical communication between the sources of the pair of MOSFETs, the at least one common source degeneration MOSFET including a plurality of gate structures. A controller is in electrical communication with the gate structures and is configured to selectively activate one or more of the gate structures for controlling the gain of the common source differential amplifier.

Abstract: An apparatus and method are provided for controlling the gain of a common source differential amplifier. The common source differential amplifier includes a pair of a metal-oxide-semiconductor field effect transistors (MOSFETs) each including a gate, a drain, and a source and at least one common source degeneration MOSFET in electrical communication between the sources of the pair of MOSFETs, the at least one common source degeneration MOSFET including a plurality of gate structures. A controller is in electrical communication with the gate structures and is configured to selectively activate one or more of the gate structures for controlling the gain of the common source differential amplifier.

Abstract: Local oscillator (LO) leakage and Image are common and undesirable effects in typical transmitters. Typically, fairly complex hardware and algorithms are used to calibrate and reduce these impairments. A single transistor that draws essentially no dc current and occupies a very small area detects the LO leakage and Image signals. The single transistor operating as a square-law device is used to mix the signals at the input and output ports of a power amplifier. The mixed signal generated by the single transistor enables the simultaneous calibration of the LO leakage and Image Rejection.

Abstract: Local oscillator (LO) leakage and Image are common and undesirable effects in typical transmitters. Typically, fairly complex hardware and algorithms are used to calibrate and reduce these impairments. A single transistor that draws essentially no dc current and occupies a very small area detects the LO leakage and Image signals. The single transistor operating as a square-law device is used to mix the signals at the input and output ports of a power amplifier. The mixed signal generated by the single transistor enables the simultaneous calibration of the LO leakage and Image Rejection.

Abstract: LO leakage and Image are common and undesirable effects in typical transmitters. Typically, thirty complex hardware and algorithms are used to calibrate and reduce these two impairments. A single transistor that draws essentially no de current and occupies a very small area, is used to detect the LO leakage and Image Rejection signals. The single transistor operating as a square law device, is used to mix the signals at the input and output ports of the power amplifier (PA). The mixed signal generated by the single transistor enables the simultaneous calibration of the LO leakage and Image Rejection.

Abstract: LO leakage and Image are common and undesirable effects in typical transmitters. Typically, thirty complex hardware and algorithms are used to calibrate and reduce these two impairments. A single transistor that draws essentially no de current and occupies a very small area, is used to detect the LO leakage and Image Rejection signals. The single transistor operating as a square law device, is used to mix the signals at the input and output ports of the power amplifier (PA). The mixed signal generated by the single transistor enables the simultaneous calibration of the LO leakage and Image Rejection.

Abstract: The specification describes a silicon-on-silicon interconnection arrangement to implement high performance RF impedance matching using off-chip passive components. The RF sections of the system are dis-integrated into separate RF functional chips, and the functional chips are flip-chip mounted on a high resistivity silicon intermediate interconnect substrate (SIIS). The passive devices for the impedance matching networks are built into the high resistivity SIIS using thin-film technology.

Abstract: The specification describes a silicon-on-silicon interconnection arrangement to implement high performance RF impedance matching using off-chip passive components. The RF sections of the system are disintegrated into separate RF functional chips, and the functional chips are flip-chip mounted on a high resistivity silicon intermediate interconnect substrate (SIIS). The passive devices for the impedance matching networks are built into the high resistivity SIIS using thin-film technology.

Abstract: A differential phase splitter circuit for producing opposite phase signals from an input AC signal is provided. A first and second transistor is provided. The source of these transistors are connected to a common first node. Further, these transistors act as a differential amplifier. The gate of the first transistor receives an input AC signal. The drain of the first transistor produces a first output AC signal. Similarly, the drain of the second transistor produces a second output AC signal that is 180 degrees out of phase with the first output AC signal. A source resistor is provided, connected in series to the common first node and ground. Lastly, an LCR feedback circuit is provided. This feedback circuit is connected between the drain of the first transistor and the gate of the second transistor. The LCR feedback circuit couples at least a fraction of the amplitude of the first output AC signal to the gate of the second transistor for amplitude balancing and phase balancing.