Microwave frequency synthesizers with rapid frequency switching

    公开(公告)号:US10218365B1

    公开(公告)日:2019-02-26

    申请号:US15968550

    申请日:2018-05-01

    Inventor: Shlomo Argoetti

    Abstract: It was found that certain VCO devices used in microwave frequency synthesizers exhibit prolonged ringing oscillation during extreme voltage jumps above a critical limit, but that this effect could be significantly reduced by splitting the voltage adjustment over multiple steps. This finding was used to improve the switching speed of such devices (e.g. wideband VCO with a computer processor, base frequency generator VCO and a frequency divider). Here, before implementing a command to switch frequencies (by changing the base frequency oscillator and frequency divider settings), the processor first determines if this change will require an extreme voltage jump likely to cause such oscillations. If so, the processor implements this voltage jump as a multiple step process, resulting in a significant reduction in the maximum time required to switch frequencies.

    QSPI based methods of simultaneously controlling multiple SPI peripherals

    公开(公告)号:US09734099B1

    公开(公告)日:2017-08-15

    申请号:US15499640

    申请日:2017-04-27

    Inventor: Shlomo Argoetti

    CPC classification number: G06F13/1689 G06F13/102 G06F13/1673 G06F13/4282

    Abstract: System and method of using a processor driven master Quad-SPI (QSPI) bus or interface to simultaneously and time-synchronously transmit different streams of data from a FIFO buffer to a plurality of different slave SPI interface peripherals. Here the QSPI interface data ports are configured to simultaneously transmit multiple 1 bit wide streams of different binary data and different chip select commands on an SPI clock cycle synchronized basis. Additional SPI slave peripherals may be controlled by use of additional non-SPI clock synchronized GPIO chip select commands and suitable logic gates. These methods are useful for creating a variety of embedded systems with faster response speeds, such as improved microwave frequency synthesizers with faster frequency changing times.

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