Abstract: A self-calibration circuit for testing an RF device includes the RF device to be tested having transmit and receive sections, and a built-in self test (BIST) circuit coupled to the transmit and receive sections of the RF device on the same chip. The self-calibration circuit is configured to calibrate the receive section of the RF device in a receive test mode, and calibrate the transmit section of the RF device in a subsequent transmit test mode using the calibrated receive section to measure a transmit output signal from the transmit section and to provide calibration data therefrom used in the transmit section calibration. The self-calibration circuit may include a duplex filter coupled between the transmit and receive sections and the BIST circuit, and a multiplexor coupled between the RF device, and the BIST circuit, configured to select one or more of a plurality of RF devices to be tested.

Abstract: A self-calibration circuit for testing an RF device includes the RF device to be tested having transmit and receive sections, and a built-in self test (BIST) circuit coupled to the transmit and receive sections of the RF device on the same chip. The self-calibration circuit is configured to calibrate the receive section of the RF device in a receive test mode, and calibrate the transmit section of the RF device in a subsequent transmit test mode using the calibrated receive section to measure a transmit output signal from the transmit section and to provide calibration data therefrom used in the transmit section calibration. The self-calibration circuit may include a duplex filter coupled between the transmit and receive sections and the BIST circuit, and a multiplexor coupled between the RF device, and the BIST circuit, configured to select one or more of a plurality of RF devices to be tested.

Abstract: A conveyor of the tilting tray type having the trays tiltable about an axis parallel to the moving direction for transverse unloading of conveyed articles at selected stations along the conveyor. Each of the trays is tiltably mounted on a carriage and has two rollers mounted at either end of a shaft secured to the tray transversely projecting to either side of the tilting axis. The rollers are respectively engaged with diametrically opposed surface portions of a disc member cranked so as to show a horizontal diameter section between respectively upwardly and downwardly slanting side portions, the disc member being mounted by the mid portion of the horizontal section on the upper end of a vertical drive shaft in such a position that the horizontal diameter section supports the rollers and thereby the tray in a locked horizontal position.