Abstract: Methods, systems, and devices for channel modulation for a memory device are described. A system may include a memory device and a host device coupled with the memory device. The system may be configured to communicate a first signal modulated using a first modulation scheme and communicate a second signal that is based on the first signal and that is modulated using a second modulation scheme. The first modulation scheme may include a first quantity of voltage levels that span a first range of voltages, and the second modulation scheme may include a second quantity of voltage levels that span a second range of voltages different than (e.g., smaller than) the first range of voltages. The first signal may include write data carried over a data channel, and the second signal may include error detection information based on the write data that is carried over an error detection channel.

Abstract: A printed circuit board has a dielectric constant different from the dielectric constant of free space, with at least two microstrip lines routed adjacent to one another on a surface of the printed circuit board. A dielectric coating is applied to at least one of the at least two microstrip lines such that the dielectric constant of the dielectric coating differs from the dielectric constant of free space. In a further embodiment, the dielectric coating comprises a material having a dielectric constant approximately equal to the dielectric constant of the printed circuit board.

Abstract: The present invention provides backscatter interrogators, communication systems and backscatter communication methods. According to one aspect of the present invention, a backscatter interrogator includes a data path configured to communicate a data signal; a signal generator configured to generate a carrier signal; and a modulator coupled with the data path and the signal generator, the modulator being configured to spread the data signal to define a spread data signal and amplitude modulate the carrier signal using the spread data signal, the modulator being further configured to phase modulate the carrier signal.

Abstract: An RFID tag includes a base having at least one fold formed therein. An integrated circuit is formed on the base. At least one antenna segment extends from the integrated circuit and crosses the fold. When the fold is creased, a portion of the antenna segment on one side of the fold is aligned to be orthogonal to a portion of the antenna segment on the other side of the fold.

Abstract: The signal integrity of a high speed heavily loaded multidrop memory bus is often degraded due the numerous impedance mismatches. The impedance mismatches causes the bus to exhibit a nonlinear frequency response, which diminishes signal integrity and limits the bandwidth of the bus. A compensating element, such as a capacitor which ties the bus to a reference plane (e.g., a ground potential), or an inductor wired in series with the bus, is located approximately midway between the memory controller and the memory slots. The use of the compensating element equalizes signal amplitudes and minimizes phase errors of signals in an interested frequency range and diminishes the amplitudes of high frequency signals which exhibit high degrees of phase error. The resulting bus structure has increased desirable harmonic content with low phase error, thereby permitting the bus to exhibit better rise time performance and permitting a higher data transfer rate.

Abstract: An RFID tag includes a base having at least one fold formed therein. An integrated circuit is formed on the base. At least one antenna segment extends from the integrated circuit and crosses the fold. When the fold is creased, a portion of the antenna segment on one side of the fold is aligned to be orthogonal to a portion of the antenna segment on the other side of the fold.

Abstract: The present invention provides backscatter interrogators, communication systems and backscatter communication methods. According to one aspect of the present invention, a backscatter interrogator includes a data path configured to communicate a data signal; a signal generator configured to generate a carrier signal; and a modulator coupled with the data path and the signal generator, the modulator being configured to spread the data signal to define a spread data signal and amplitude modulate the carrier signal using the spread data signal, the modulator being further configured to phase modulate the carrier signal.

Abstract: A memory module is coupled to a number of controllers. The memory module is configured to configure each of a number of data input/output ports thereof as at least one of an input and an output in response to a first command from a particular controller of the controllers. The memory module is configured to partition itself into memory partitions in response to a second command from the particular controller so that each memory partition corresponds to a respective one of the controllers. Each of a number of data input/output ports of the controllers is configurable as at least one of an input and an output to correspond to a respective one of the input/output ports of the memory module. The first and second commands may originate from the particular controller, or the controllers may be coupled in parallel to the memory module.

Abstract: The present invention relates to wireless communication systems, interrogators and methods of communicating within a wireless communication system. One aspect of the present invention provides a wireless communication system including at least one remote communication device configured to communicate a return link wireless signal; an interrogator including: a communication station configured to receive the return link wireless signal and to generate a return link communication signal corresponding to the return link wireless signal; communication circuitry coupled with the communication station and configured to communicate the return link communication signal; and a housing remotely located with respect to the communication station and including circuitry configured to receive the return link communication signal from the communication circuitry and to process the return link communication signal.

Abstract: Examples described include memory units coupled to a controller using a daisy chain wiring configuration. A filter located between a first memory unit and the controller attenuates a particular frequency, which may improve ringback in a signal received at the memory units. In some examples, a quarter-wavelength stub is used to implement the filter. In some examples, signal components at 800 MHz may be attenuated by a stub, which may improve ringback.

Abstract: A memory module is coupled to a number of controllers. The memory module is configured to configure each of a number of data input/output ports thereof as at least one of an input and an output in response to a first command from a particular controller of the controllers. The memory module is configured to partition itself into memory partitions in response to a second command from the particular controller so that each memory partition corresponds to a respective one of the controllers. Each of a number of data input/output ports of the controllers is configurable as at least one of an input and an output to correspond to a respective one of the input/output ports of the memory module. The first and second commands may originate from the particular controller, or the controllers may be coupled in parallel to the memory module.

Abstract: Aspects of a communication system include phase shifters, interrogators, methods of shifting a phase angle of a signal, and methods of operating an interrogator. One example provides a phase shifter that include a first power divider configured to receive a signal and provide plural quadrature components of the signal; plural mixers coupled with the first power divider and configured to scale the quadrature components using a phase shift angle; and a second power divider coupled with the mixers and configured to combine the scaled quadrature components to shift the phase angle of the input signal by the phase shift angle.

Abstract: A memory module has one or more memory devices, a controller in communication with the one or more memory devices, and a plurality of input/output ports. The controller is configured to configure each input/output port as an input, an output, or a bidirectional input/output.

Abstract: A radio frequency identification (RFID) device includes an antenna linked to a receiving circuit, the antenna tuned to receive a radio frequency (RF) time-code signal from a public source, a controller circuit and an internal clock linked to the receiving circuit, a microcontroller linked to the receiving circuit, a memory linked to the microcontroller, and a battery linked to and powering the receiving circuit, controller circuit, internal clock, microcontroller and memory.

Abstract: Examples described include memory units coupled to a controller using a daisy chain wiring configuration. A filter located between a first memory unit and the controller attenuates a particular frequency, which may improve ringback in a signal received at the memory units. In some examples, a quarter-wavelength stub is used to implement the filter. In some examples, signal components at 800 MHz may be attenuated by a stub, which may improve ringback.

Abstract: Examples described include memory units coupled to a controller using a daisy chain wiring configuration. A filter located between a first memory unit and the controller attenuates a particular frequency, which may improve ringback in a signal received at the memory units. In some examples, a quarter-wavelength stub is used to implement the filter. In some examples, signal components at 800 MHz may be attenuated by a stub, which may improve ringback.

Abstract: An RFID tag includes a base having at least one fold formed therein. An integrated circuit is formed on the base. At least one antenna segment extends from the integrated circuit and crosses the fold. When the fold is creased, a portion of the antenna segment on one side of the fold is aligned to be orthogonal to a portion of the antenna segment on the other side of the fold.

Abstract: A wireless communication system includes an interrogator including a housing including circuitry configured to generate a forward link communication signal; communication circuitry configured to communicate the forward link communication signal; and a communication station remotely located with respect to the housing and configured to receive the forward link communication signal from the communication circuitry and to radiate a forward link wireless signal corresponding to the forward link communication signal; and at least one remote communication device configured to receive the forward link wireless signal.

Abstract: The present invention includes backscatter communication systems, interrogators, methods of communicating in a backscatter system, and backscatter communication methods. According to one aspect of the present invention, a backscatter communication system includes an interrogator including a transmitter configured to output a forward link communication and a receiver configured to receive a return link communication having a carrier signal, the receiver being configured to reduce the amplitude of the carrier signal of the return link communication; and a communication device configured to modulate the carrier signal to communicate the return link communication responsive to reception of the forward link communication.

Abstract: The present invention includes backscatter communication systems, interrogators, methods of communicating in a backscatter system, and backscatter communication methods. According to one aspect of the present invention, a backscatter communication system includes an interrogator including a transmitter configured to output a forward link communication and a receiver configured to receive a return link communication having a carrier signal, the receiver being configured to reduce the amplitude of the carrier signal of the return link communication; and a communication device configured to modulate the carrier signal to communicate the return link communication responsive to reception of the forward link communication.