摘要:
Delay elements and delay lines having glitchless operation are disclosed. By way of example, apparatus for delaying an input signal comprises a reference current generator for generating a constant current, wherein the constant current is insensitive to a variation of a power supply voltage, at least one variable bias voltage generator coupled to the reference current generator for generating a set of bias voltages based on the constant current generated by the reference current generator and a digitally programmable delay control input, and at least one delay element coupled to the at least one variable bias voltage generator for delaying the input signal by a constant delay which is determined by the set of bias voltages generated by the at least one variable bias voltage generator.
摘要:
Delay elements and delay lines having glitchless operation are disclosed. By way of example, apparatus for delaying an input signal comprises a reference current generator for generating a constant current, wherein the constant current is insensitive to a variation of a power supply voltage, at least one variable bias voltage generator coupled to the reference current generator for generating a set of bias voltages based on the constant current generated by the reference current generator and a digitally programmable delay control input, and at least one delay element coupled to the at least one variable bias voltage generator for delaying the input signal by a constant delay which is determined by the set of bias voltages generated by the at least one variable bias voltage generator.
摘要:
The on-chip power supply noise sensor detects high frequency overshoots and undershoots of the power supply voltage. By creating two identical current sources and attaching a time constant circuit to only one, the high frequency transient behavior differs while the low frequency behavior is equivalent. By comparing these currents, the magnitude of very high frequency power supply noise can be sensed and used to either set latches or add to a digital counter. This has the advantage of directly sensing the power supply noise in a manner that does not require calibration. Also, since the sensor requires only one power supply, it can be used anywhere on a chip. Finally, it filters out any lower frequency noise that is not interesting to the circuit designer and can be tuned to detect down to whatever frequency is needed.
摘要:
Embodiments of the invention relate to a neuromorphic network for producing spike-timing dependent plasticity. The neuromorphic network includes a plurality of electronic neurons and an interconnect circuit coupled for interconnecting the plurality of electronic neurons. The interconnect circuit includes plural synaptic devices for interconnecting the electronic neurons via axon paths, dendrite paths and membrane paths. Each synaptic device includes a variable state resistor and a transistor device with a gate terminal, a source terminal and a drain terminal, wherein the drain terminal is connected in series with a first terminal of the variable state resistor. The source terminal of the transistor device is connected to an axon path, the gate terminal of the transistor device is connected to a membrane path and a second terminal of the variable state resistor is connected to a dendrite path, such that each synaptic device is coupled between a first axon path and a first dendrite path, and between a first membrane path and said first dendrite path.
摘要:
A variable input voltage regulator includes a first circuit configured to convert a first voltage from a first voltage source to a first current, and a second circuit electrically coupled to the first circuit and configured to mirror the first current to a voltage output node. The variable input voltage regulator further includes a third circuit electrically coupled to the voltage output node of the second circuit and configured to supply additional current to the voltage output node from a second voltage of a second voltage source in response to a control input.
摘要:
A regulated delay line device includes main regulator coupled to a node, and a plurality of delay branches coupled to the node to receive a voltage output to the node by the main regulator. Each of the plurality of delay branches includes a micro-regulator and a delay line. The delay line is coupled to the micro-regulator such that unfiltered noise is removed locally at each delay branch by a corresponding micro-regulator.
摘要:
A variable input voltage regulator includes a first circuit configured to convert a first voltage from a first voltage source to a first current, and a second circuit electrically coupled to the first circuit and configured to mirror the first current to a voltage output node. The variable input voltage regulator further includes a third circuit electrically coupled to the voltage output node of the second circuit and configured to supply additional current to the voltage output node from a second voltage of a second voltage source in response to a control input.
摘要:
A linear voltage regulator is provided. The linear voltage regulator includes a first circuit configured to receive the first voltage from a voltage source and to remove frequency components of the first voltage in a first frequency range to obtain an output voltage at a primary output node. The linear voltage regulator further includes a second circuit having first and second inverters electrically coupled to the primary output node of the first circuit. The second circuit is configured to receive the output voltage and to remove frequency components of the output voltage in a second frequency range. The second frequency range is greater than the first frequency range.
摘要:
Self-synchronizing techniques for checking the accuracy of a pseudorandom bit sequence (PRBS) are provided. The PRBS being checked may be generated by a device (e.g., a device under test) in response to a PRBS received by the device (e.g., from a PRBS generator). In an aspect of the invention, a PRBS checking technique includes the following steps/operations. For a given clock cycle, the presence of an error bit in the PRBS generated by the device is detected. The error bit represents a mismatch between the PRBS input to the device and the PRBS output from the device. Then, propagation of the error bit is prohibited for subsequent clock cycles. The prohibition step/operation may serve to avoid multiple errors being counted for a single error occurrence and/or masking errors in the PRBS output by the device.
摘要:
The on-chip power supply noise sensor detects high frequency overshoots and undershoots of the power supply voltage. By creating two identical current sources and attaching a time constant circuit to only one, the high frequency transient behavior differs while the low frequency behavior is equivalent. By comparing these currents, the magnitude of very high frequency power supply noise can be sensed and used to either set latches or add to a digital counter. This has the advantage of directly sensing the power supply noise in a manner that does not require calibration. Also, since the sensor requires only one power supply, it can be used anywhere on a chip. Finally, it filters out any lower frequency noise that is not interesting to the circuit designer and can be tuned to detect down to whatever frequency is needed.