Abstract: A circuit device includes a first terminal to be coupled to one end of a resonator, a second terminal to be coupled to another end of the resonator, an amplifying element configured to amplify a signal from the first terminal to output the signal amplified to the second terminal, a first resistor element disposed on a signal path between an input node and an output node of the amplifying element, a capacitance element disposed on a signal path between the first terminal and the input node, and a first switch element configured to switch electrical coupling between the input node and a ground.

Abstract: An oscillation maintenance circuit with comparator-based pulse generation is provided. By sampling an RF signal and controlling a pulse generation circuit to generate a pulse signal of the same frequency as the RF signal, a switch unit is controlled to be ON/OFF at a same frequency as the RF signal, achieving synchronization between change of the current injection and the RF signal. Thus, the oscillation frequency is not affected by current injection, ensuring the FSK communication performance. At the same time, two comparators are respectively compared with two reference voltage levels to obtain an output pulse signal, and the reference voltage levels can be adjusted according to practical requirements, so that the switch-on point of time and current injection time duration are adjustable, maximizing the efficiency of current injection, resulting in simple circuit structure, low power consumption, and increased communication distance of an HDX passive RFID transponder.

Abstract: A half-duplex RFID oscillation maintenance circuit with trigger-based pulse generation is provided, including: a resonance inductor and a resonance capacitor forming an L-C resonance circuit coupled to an external radio frequency field to generate alternating current for a rectifier circuit, which is connected to an energy-storage capacitor. A first antenna end is connected to a trigger circuit through a switch unit and a resistor connected in series; and an output end of the trigger circuit is connected to a control end of the switch unit. The trigger circuit is configured to sample an oscillation signal at the first antenna end to generate a rectangular wave signal, whose pulse width can be self-adaptively adjusted, to control OFF/ON of the switch unit and, when the switch unit is ON, to form a current injection loop from the energy-storage capacitor to the L-C resonance circuit.

Abstract: Systems and methods for reducing process sensitivity in integrated circuit (“IC”) fabrication. An integrated circuit structure is provided that includes a first integrated circuit device having at least one parameter influenced by process variation in a first manner. The integrated circuit structure further includes a second integrated device having the least one parameter influenced by the process variation in a second manner. The first manner is opposite of the second manner. The second integrated device is configured to offset or reduce the influence of the process variation on the at least one parameter in the first integrated circuit device.

Abstract: A class-D amplifier includes a quantized amplifier, having no quantization error feedback circuit, coupled to receive a digital input signal, according to which an output signal is generated to be switched between power rails. The digital input signal is pre-compensated to correct an error. A low-pass filter is configured to operate on the output signal to generate a filtered output signal.

Abstract: Very high frequency circuits suffer from parasitic resistances. At 60 GHz, conventional layout techniques can introduce loss into the circuit at critical locations. One critical interconnect between the output of a pre-driver and the gate of the final output stage causes 1 or 2 dB of loss due to the layout. By minimizing the number of via contacts, this conventional loss can be recovered using this new layout technique. In addition, a tap point of a via stack is used to modify the resonant characteristics of the interconnect. Finally, cross coupled devices in a resonant circuit are used to reduce the common mode noise at the expense of the common mode gain.

Abstract: A switched capacitor circuit includes a positive side capacitor coupled to a first positive side node; a first positive side switch element for selectively coupling the first positive side node to a second node according to a first control signal; and a precharge circuit coupled to the first positive side node for precharging the first positive side node to a precharge voltage for a predetermined time when the first positive side switch element is switched off according to the first control signal, and then for charging the first positive side node to a charge voltage until the first positive side switch element is switched on according to the first control signal. By rapidly precharging the first positive side node, the clock feedthrough effect is eliminated and the locking period of the VCO is shortened. Afterwards by charging the first positive side node, the phase noise of the VCO is minimized.

Abstract: Provided are an oscillatory circuit based on a metal-insulator transition (MIT) device that can generate a simple and very high oscillating frequency using the MIT device, and a method of driving the oscillatory circuit. The oscillatory circuit includes the MIT device that comprises an MIT thin film and an electrode thin film connected to the MIT thin film and in which an abrupt MIT is generated due to an MIT generating voltage, a resistor that is serially connected to the MIT device, an electric al power source limiting the maximum amount of an applied current and applying a direct current constant voltage to the MIT device, and a light source irradiating electromagnetic waves on the MIT device, wherein the oscillating properties are generated by irradiating the electromagnetic waves using the light source.

Abstract: Provided are an MIT device-based oscillation circuit including a power source, an MIT device and a variable resistor, in which a generation of an oscillation and an oscillation frequency are determined according to a voltage applied from the power source and a resistance of the variable resistor, and a method of adjusting the oscillation frequency of the oscillation circuit. The MIT device includes an MIT thin film and an electrode thin film connected to the MIT thin film, and generates a discontinuous MIT at an MIT generation voltage, the variable resistor is connected in series to the MIT device, and the power source applies a voltage or an electric current to the MIT device. The generation of an oscillation and an oscillation frequency are determined according to the voltage applied from the power source and the resistance of the variable resistor.

Abstract: A semiconductor device according to an exemplary aspect of the invention is capable of being selectively switched between an oscillation circuit and a signal input-output circuit, and includes first and second external connecting terminals that are connectable to an oscillation device; an inverting amplifier an input side of which is electrically connected to the first external connecting terminal through a coupling capacitor and an output side of which is electrically connected to the second external connecting terminal; a feedback resistor connected to the input side and the output side of the inverting amplifier; a bias stabilization circuit that stabilizes a bias applied to the coupling capacitor; a first signal input-output portion connected to the first external connecting terminal; and a second signal input-output portion connected to the second external connecting terminal.

Abstract: Described herein is the method and apparatus for determining frequency of an oscillator coupled with one or more analog devices, and for determining within-die or across-die variations in an analog property associated with the one or more analog devices, the determining based on the oscillator frequency. The analog property includes output signal swing, bandwidth, offset, gain, and delay line linearity and range. The one or more analog devices include input-output (I/O) buffer, analog amplifier, and delay line. The method further comprises updating a simulation model file based on the determining of the within-die and/or across-die variations of the analog property.

Abstract: A device including a voltage regulator with an adaptive switching frequency circuit for noise-sensitive analog circuits, such as oscillatory systems with phase-lock loops (PLLs) and voltage-controlled oscillators (VCOs) is described. In an exemplary embodiment, the device includes a reference clock oscillator, a low-jitter oscillator, a power supply including a clock signal input to regulate a power supply voltage for the low-jitter oscillator, a clock detector to generate a clock detector control signal when the low-jitter oscillator output frequency is stable, and a multiplexer to select between a reference clock oscillator output signal and a low-jitter oscillator output signal as the clock signal input to the power supply to mitigate effects of period jitter in the low-jitter oscillator output signal when the clock detector control signal is asserted.

Abstract: An oscillation maintenance circuit for a half-duplex transponder that has an LC resonant circuit, a storage capacitor and a rectifier connected to charge the storage capacitor with a rectified oscillation signal, having an end-of-burst detector providing an end-of-burst signal when the amplitude of the oscillation signal has dropped below a predetermined threshold. A clock regenerator provides a clock signal derived from the oscillation signal. Switching means controlled by the clock signal in the presence of the end-of-burst signal connect the storage capacitor with LC resonant circuit through at least one current limiting resistor during part of the period of the clock signal, in such a manner that energy is fed into the LC resonant circuit.

Abstract: An oscillation maintenance circuit for a half-duplex transponder that has an LC resonant circuit, a storage capacitor and a rectifier connected to charge the storage capacitor with a rectified oscillation signal, having an end-of-burst detector providing an end-of-burst signal when the amplitude of the oscillation signal has dropped below a predetermined threshold. A clock regenerator provides a clock signal derived from the oscillation signal. Switching means controlled by the clock signal in the presence of the end-of-burst signal connect the storage capacitor with LC resonant circuit through at least one current limiting resistor during part of the period of the clock signal, in such a manner that energy is fed into the LC resonant circuit.

Abstract: An input circuit includes an input signal transmission circuit configured to output a first transmission signal at a first output node in response to an input signal at an input node, and a Schmitt trigger inverter configured to output a second transmission signal at a second output node in response to the first transmission signal. The input signal transmission circuit includes a voltage drop element connected to the input node and configured to provide a voltage drop between the input node and a transistor having a gate to which a first supply voltage is applied.

Abstract: A centrifugal separating-distributing apparatus includes a body being provided with an intake path, a stacking path, and a distributing path. A fluid sample is taken into the intake path, and the sample flows out from an outlet of the path when a first centrifugal force is exerted at a first rotation angle position. Under the first centrifugal force, the flown out sample flows in an inlet of the stacking path and is separated into plural components and the components are stacked in the stacking path. When a second centrifugal force is exerted at a second rotation angle position, a component closest to the inlet of the stacking path flows into an inlet of the distributing path between the outlet of the intake path and the inlet of the stacking path, and is moved away from the inlet to be separated from the remainder of the components in the stacking path.

Abstract: A voltage-controlled capacitor circuit and related circuitry. The voltage-controlled capacitor circuit includes a metal-oxide semiconductor (MOS) varactor, a diode varactor, and/or a capacitor with fixed capacitance. The MOS varactor, the diode varactor and the capacitor are electrically connected in parallel or in series to form a capacitor with a preferred characteristic of voltage-controlled capacitance.