Abstract:
Methods for reading a data location coupled to an electrical conductor. A counter receives a signal from an analog-to-digital converter coupled to the electrical conductor. The counter produces two or more counts, and in some embodiments, the counts are based in part on a variable reference voltage. An interfuser may be coupled to an output of the counter. The interfuser receives the two or more counts from the counter and reads data conveyed by the data location based on the two or more counts.
Abstract:
Systems, methods, and devices are disclosed, including an electronic device that includes a first data location, a quantizing circuit, and a reference current source, all coupled to an electrical conductor. The reference current source may include a current mirror with a side coupled to the electrical conductor and a second data location coupled to another side of the current mirror.
Abstract:
A memory device that, in certain embodiments, includes a plurality of memory elements connected to a bit-line and a delta-sigma modulator with a digital output and an analog input, which may be connected to the bit-line. In some embodiments, the delta-sigma modulator includes a circuit with first and second inputs and an output. The circuit is configured to combine (add or subtract) input signals. The first input may be connected to the analog input. The delta-sigma modulator may also include an integrator connected to the output of the circuit, an analog-to-digital converter with an input connected to an output of the integrator and an output connected to the digital output, and a digital-to-analog converter with an input connected to the output of the analog-to-digital converter and an output connected to the second input of the circuit.
Abstract:
A single camera capable of capturing high speed laser return pulses for a target, as well as provide imaging information on the background of the target. This capability is enabled by having a read-out integrated circuit (ROIC) capable of extracting both types of information from a pixel of a focal plane array (FPA). Further, an ROIC topology that allows for the ability to distinguish between high frequency and low frequency signal paths, and provide supporting circuitry to process the two paths separately. One path may integrate the low frequency background scene to provide a high fidelity image of the scene. The second path may process high frequency noise and multiple laser pulse returns within a frame. These two paths may be combined to provide a background image with a superimposed laser return.
Abstract:
Systems, methods, and devices for obtaining data from a data location. The method may include generating a first value by sensing a data location under a first condition and generating a second value by sensing the data location under a second condition. The method may further include combining the first value with the second value to identify data conveyed by the data location.
Abstract:
A device that includes an internal data storage location coupled to an electrical conductor and an analog-to-digital converter coupled to the internal data storage location via the electrical conductor. In some embodiments, the analog-to-digital converter includes a comparator having an input coupled to the electrical conductor and a switch coupled to the electrical conductor.
Abstract:
A memory device with increased communication bandwidth is described. In this memory device, control logic routes data signals from a memory array using inactive bitlines in response to a read command. These data signals are then placed on an adjacent unused input/output (I/O) line or routing channel, as opposed to a proximate I/O line that is in use. For example, unused bitlines located on the top and bottom of the memory array may be used to route data signals to adjacent local I/O lines. In particular, the data signals can be placed on unused local I/O lines which are associated with adjacent bitline sense amplifiers. The resulting increased communication bandwidth can overcome the constraints imposed by the limited number of local I/O lines in the memory device without appreciably increasing the chip size, power consumption, or cost.
Abstract:
An apparatus and method is disclosed to compensate for skew and asymmetry of a locally processed system clock used to synchronize an output signal, e.g., a data signal or a timing signal, from a logic circuit, for example a memory device. A first phase detector, array of delay lock loop (DLL) delay elements and accompanying circuitry are disclosed to phase-lock the rising edge of the output signal with the rising edge of the system clock XCLK signal. Additionally, a comparator circuit, a register delay, an array of DLL delay elements and accompanying circuitry are disclosed to add or subtract delay from the falling edge of the DQ signal in order to produce a symmetrical output of the DQ signal.
Abstract:
A K-Delta-1-Sigma modulator filters or integrates (Sigma) the difference (Delta) between K-feedback paths and an input signal. By using K-feedback paths the topology enables sample rates that are K times the clock frequency of any one feedback path. The sigma block can be implemented in a number of ways including an active or passive integrator or a filter with specific characteristics. When implemented as an integrator, the sigma block is common to all the feedback paths, so that the modulation noise is pushed to a portion of the spectrum where it can be reduced by filtering. The delta block can be implemented in a number of ways including analog adders or switched capacitors.
Abstract:
A memory device that, in certain embodiments, includes a plurality of memory elements connected to a bit-line and a delta-sigma modulator with a digital output and an analog input, which may be connected to the bit-line. In some embodiments, the delta-sigma modulator includes a circuit with first and second inputs and an output. The circuit is configured to combined (add or subtract) input signals. The first input may be connected to the analog input. The delta-sigma modulator may also include an integrator connected to the output of the circuit, an analog-to-digital converter with an input connected to an output of the integrator and an output connected to the digital output, and a digital-to-analog converter with an input connected to the output of the analog-to-digital converter and an output connected to the second input of the circuit.