摘要:
A switch comprising a spin-transistor and a first control wire. The spin-transistor is configured so that when a magnetic field applied to the spin-transistor is less than a threshold value, the transistor is in a conductive state in which electric current flows through the spin-transistor. When the magnetic field applied to the spin-transistor is greater than the threshold value, the spin-transistor is in a resistive state in which the electric current flowing through the spin-transistor is substantially reduced. The first control wire is for receiving a current to affect the magnetic field applied to the spin-transistor.
摘要:
Emitter-coupled logic circuits and systems that include such circuits are provided. Some emitter-coupled logic circuits include a plurality of fT-doubler circuits. Each fT-doubler circuit includes a plurality of transistors coupled to one another in an arrangement such that the plurality of transistors are configured to behave as a single enhanced transistor that has an effective unity current gain frequency that is higher than if a single transistor were used in its place. The fT-doubler circuits are configured to increase an operating frequency capability of the emitter-coupled logic circuit. Some emitter-coupled logic circuits include a plurality of cascode amplifier circuits. Each cascode amplifier circuit includes multiple transistors. An emitter of at least one first transistor of the plurality of transistors is coupled to a collector of at least one second transistor of the plurality of transistors Some emitter-coupled logic circuits may include both fT-doubler circuits and cascode amplifier circuits.
摘要:
A system includes a first CML buffer configured to receive a first bias signal and a first CML signal of a first CML logic family. The first CML buffer produces a second CML signal of the first CML logic family based on the first CML signal and the first bias signal. A first coupling capacitor module couples to the first CML buffer. The first coupling capacitor module receives the second CML signal and produces a third CML signal based on the second CML signal. A second CML buffer couples to the coupling capacitor module and receives a second bias signal and the third CML signal, producing a fourth CML signal of a second CML logic family. A feedback module couples to the second CML buffer and receives the fourth CML signal producing a fifth CML signal. The second CML buffer is produces the fourth CML signal based on the second bias signal, the third CML signal, and the fifth CML signal.
摘要:
A low-voltage differential signal driver for high-speed digital transmission includes a first converter operable to receive a signal in a first type and convert the signal into a second type, and a cascode current mirror coupled to the first converter. The cascode current mirror provides an impedance level that increases a differential output voltage.
摘要:
A driver circuit is provided herein. In general, the driver circuit includes a driver portion, a common mode feedback portion and a current replication portion. The feedback portion receives a common mode voltage (vcm) from the driver portion and an alternative common mode voltage (vcm_alt) from the current replication portion. The feedback portion selects one of the common mode voltages for comparison with a reference voltage and generates a feedback bias signal (vcmfb) based on a voltage difference there between. When the driver circuit is enabled, the actual common mode voltage (vcm) is used to maintain the output common mode voltage around the reference voltage. When the driver circuit is disabled, the alternative common mode voltage (vcm_alt) is used to keep the bias signal (vcmfb) from drifting away.
摘要:
The invention relates to an electronic circuit comprising differential signal input means, a combining stage, a discriminating stage and differential signal output means. The discriminating stage comprises four transistors (Q8, Q9, Q10, Q11) each having first electrodes (83, 93, 103, 113) and second electrodes (81, 91, 101, 111) and a respective gate electrode (82, 92, 102, 112). The first electrodes of said four transistors are connected to a common node. The combining stage is arranged to convert differential input signals into gate signals applied to the gate electrodes of some of said four transistors respectively.
摘要:
An electronic circuit includes at least one differential pair of transistors, a control transistor switch, a first current source and a second current source. The second current source is connected to a common emitter node of the pair of transistors in order to accelerate the discharge of parasitic capacitances during a switching operation.
摘要:
A receiver circuit (12) includes a first gate (24) that receives an input signal (VIN0, VIN1) and has an output (32, 34) for providing an output signal (VG0, VG1). A shifting circuit (20) is coupled for shifting the common mode potential of the input signal to produce a shifted signal (VSH0, VSH1). A second gate (22) has an input (27, 28) that receives the shifted signal and an output coupled to the output of the first gate.
摘要:
A circuit topology for high speed low voltage logic circuits is disclosed that reduces the number of levels of stacked active circuit elements from 3 to 2. Circuits providing a variety of logic functions are presented, including a latch, an exclusive OR gate, a combination XOR and latch, a multiplexer and a demultiplexer. Circuits built according to the principles of the invention have been operated at speeds of 40 GHz. The circuit topology can operate at supply voltages as low as 2V (for silicon or silicon-germanium based devices) and provide power saving of 25%–50% or more, depending on the logic function. In some embodiments, circuits comprising single ended or differential inputs can be provided.
摘要:
A charge pump circuit able to enhance the rising and falling characteristics of a current output, drive the current output with a short pulse, reduce leakage current at the OFF time when a current is not output, and realize a reduction of a power consumption and a PLL circuit using same. By outputting a charge current or a discharge current in accordance with an up signal or a down signal and turning on a third transistor (PC, NC) at the OFF time when the current is not output, an inverse bias voltage is supplied between a gate and a source of the second transistor (PA, NA), whereby a reduction of the leakage current can be realized. When the second or third transistor is switched in accordance with the up signal or the down signal, the timing of the control signal is appropriately controlled, simultaneous turning on of the second and third transistors can be avoided, release or injection of charges from and to the output terminal of the charge pump circuit can be prevented, and the stability of an oscillation frequency of a VCO can be improved.