Abstract: Wireless circuitry can include a processor that generates a baseband signal, an upconversion circuit that upconverts the baseband signals to a radio-frequency signal, and an amplifier that amplifies the radio-frequency signal. A tunable delay circuit can be used to selectively delay generation of the radio-frequency signal or to delay generation of another signal intended for the radio-frequency amplifier. The tunable delay circuit can be controlled using a closed-loop delay adaptation scheme. A feedback receiver that is coupled to an output of the amplifier can be used to generate a demodulated signal. A delay error measurement circuit can be used to receive the demodulated signal, to detect a peak by monitoring when an envelope of the demodulated signal crosses a threshold level, to compute an amount of asymmetry in the detected peak, and to output a signal that is used to control the tunable delay circuit.

Abstract: Device for the refilling of a print head of an ink jet printer outside of the ink jet printer, with a holder, into which the print head can be inserted, wherein the print head includes an ink supply chamber, which is in fluid communication with the emission opening of a nozzle plate and which is vented through a ventilation opening, withan ink tank, which by means of a conduit and a coupling piece is capable of forming a fluid connection with a fluid tight sealing engagement with the ventilation opening,a receptacle container, which via a conduit and a coupling piece is sealingly engageable with the nozzle plate for establishing a fluid communication with a fluid tight seal,a pump with a reversible conveyancing direction, which is provided between the ink tank and the ventilation opening,control electronics, which works upon the pump in such a manner, that the ink is conveyed from the ink tank to the ink supply chamber so long, until the desired fill condition is achieved and subsequently the supply direction

Abstract: A device for refilling a print cartridge (100) of an ink jet printer comprising a receptacle (4) with a sealing element (7), in which the print cartridge (100) can be seated with close tolerance. The sealing element (7) is positioned against the ink nozzle (103) provided on the underside of the housing (101) and is brought into tight sealing engagement by means of a locking element (5) which engages with an edge of the casing of the print cartridge (100). In addition, a hollow needle carrier (18) with a hollow needle (17) is provided, which can be seated upon the print cartridge (100) or as the case may be, the receptacle (4). The hollow needle (17) penetrates through a bore hole (106) of the print cartridge (100) into the ink supply chamber on the inside of the print cartridge (100). A refill cartridge (200) can be stuck onto the hollow needle (17). With the help of this device, print cartridges can simply and safely be refilled.