摘要:
A latch having increased soft error rate tolerance includes cross-coupled inverters having transistors with varying sizes. Diffusion regions of transistors coupled to storage nodes are kept small to reduce the effect of charge accumulation resulting from particles bombarding the bulk of an integrated circuit die. Transistors having gates coupled to the storage nodes are increased in size to increase the capacitance on the storage nodes. The reduced size of diffusion regions and increased size of gates on storage nodes combine to reduce the effects of accumulated charge. Diffusion region area is further reduced by reducing the size of pass gates that load normal data and scan data. A large capacitor is coupled to a feedback node within the cross-coupled inverters to further reduce the effect of accumulated charge.
摘要:
In some embodiments, the invention includes circuit having a differential amplifier and body bias control circuitry. The differential amplifier includes a differential pair of first and second FET transistors to at least partially control output voltage signals responsive to input voltage signals, the first and second FET transistors being configured to be matched and having a body. The body bias control circuitry provides a body bias voltage signal to the body to place the first and second FET transistors in a forward body bias condition. The differential amplifier and body bias circuitry may be used in a sense amplifier, comparator, voltage controlled oscillator, delay locked loop, and phase locked loop as well as other circuits.
摘要:
Briefly, in accordance with one or more embodiments, a radio device comprises an analog front end comprising a radio to transmit and/or receive radio-frequency signals, and a programmable engine coupled to the analog front end. The programmable engine is capable of being programmed to perform one or more tests on the analog front end and includes a reconfigurable data path reconfigurable by the programmable engine to perform one or more tests on the analog front end.
摘要:
A discrete time filter achieves gain by sampling a signal using capacitors arranged in a one configuration and then changing the capacitors to a series configuration to develop a filter output voltage. In at least one embodiment, a variable gain filter is achieved by varying the number of capacitors that are active in the filter.
摘要:
Disclosed is a system and method for controlling a resonance frequency of a Film Bulk Acoustic Resonator (FBAR) device. The system includes at least one switching capacitor coupled to the FBAR device and a modulator. The at least one switching capacitor includes at least one capacitor and a switch configuration disposed in series with the FBAR device and the at least one capacitor, which is switch configuration capable of opening and closing connection of the at least one capacitor with the FBAR device. The modulator is coupled to the switch configuration, which generates a switching condition signal based on the manufacturing variation in the FBAR device and the environmental effects on the FBAR device. The switch configuration performs opening and closing of the connection of the at least one capacitor and the FBAR device based on the switching condition signal.
摘要:
A hardened latch capable of providing protection against single event upsets (SEUs) is disclosed. The hardened latch includes a first latch and a second latch that mirrors a subset of gates of the first latch. The second latch is inserted in the feedback path of the keeper circuit of the first latch and is cross-coupled with the gates of the keeper circuit of the first latch. The latch is hardened against single event upsets and an arbitrary number of successive SEUs attacking a single node, provided that the time between successive SEUs is larger than the recovery time of the latch. An alternate embodiment of the hardened latch includes a split buffer output. This embodiment is capable of reducing the propagation of erroneous transients. Another alternate embodiment of the hardened latch includes a Miller C buffer output. This embodiment is capable of reducing the propagation of erroneous transients below the level achievable in a hardened latch employing a split buffer output.
摘要:
Analog circuits for providing one or more waveform parameters, e.g., the DC offset or average, of an analog input signal. Separate biasing is not necessarily required. Some embodiments comprise field-effect-transistors (FETs) configured in various diode-connected configurations that take advantage of leakage currents through the FETs so that long resistors or large capacitors are not necessarily required. One embodiment comprises two diode-connected FETs to provide an unbiased DC offset voltage of an analog input signal.
摘要:
In some embodiments, the invention includes a domino circuit having a precharge circuit including a source follower nFET device coupled to a domino stage conductor. An evaluation path circuit is also coupled to the domino stage conductor. A hysteretic output stage receives a signal from the domino stage conductor and provide therefrom an evaluated output signal. In other embodiments, the invention includes a domino circuit having a predischarge circuit coupled to a domino stage conductor. An evaluation path circuit includes source follower nFET devices coupled to the domino stage conductor. A hysteretic output stage receives a signal from the domino stage conductor and provides therefrom an evaluated output signal. In still other embodiments, the invention includes a domino circuit having a precharge circuit including coupled to a domino stage conductor. An evaluation path circuit is coupled to the domino stage conductor. An output stage includes an inverter to receive a signal from the domino stage conductor and to provide an evaluated output signal on an output conductor, the output stage including a duplicate evaluation path circuit coupled to an output conductor.
摘要:
A discrete time filter achieves gain by sampling a signal using capacitors arranged in a one configuration and then changing the capacitors to a series configuration to develop a filter output voltage. In at least one embodiment, a variable gain filter is achieved by varying the number of capacitors that are active in the filter.