66 results about "Cmos logic circuits" patented technology

A novel RF buffer circuit adapted for use with an RF switch circuit and method for switching RF signals is described. The RF switch circuit is fabricated in a silicon-on-insulator (SOI) technology. The RF switch includes pairs of switching and shunting transistor groupings used to alternatively couple RF input signals to a common RF node. The switching and shunting transistor grouping pairs are controlled by a switching control voltage (SW) and its inverse (SW_). The switching and shunting transistor groupings comprise one or more MOSFET transistors connected together in a “stacked” or serial configuration. The stacking of transistor grouping devices, and associated gate resistors, increase the breakdown voltage across the series connected switch transistors and operate to improve RF switch compression. A fully integrated RF switch is described including digital control logic and a negative voltage generator integrated together with the RF switch elements. In one embodiment, the fully integrated RF switch includes a built-in oscillator, a charge pump circuit, CMOS logic circuitry, level-shifting and voltage divider circuits, and an RF buffer circuit. Several embodiments of the charge pump, level shifting, voltage divider, and RF buffer circuits are described. The inventive RF switch provides improvements in insertion loss, switch isolation, and switch compression.

A low leakage monotonic CMOS logic circuit and a method, a method of design and a system for designing such circuits. The circuit, including: one or more logic stages, at least one of the logic stages having a predominantly high input state or having a predominantly low input state; wherein the logic stages having the predominantly high input state, comprise one or more thin gate dielectric and high threshold voltage PFETs with respect to a reference PFET and one or more thick gate dielectric and low threshold voltage NFETs with respect to a reference NFET; and wherein the logic stages having the predominantly low input state, comprise one or more thick gate dielectric and low threshold voltage PFETs with respect to the reference PFET and one or more thin gate dielectric and high threshold voltage NFETs with respect to the reference NFET.

Disclosed is an oscillator in which current consumption relating to oscillation is reduced. The oscillator comprises: an amplifier to an input and output of which a piezoelectric oscillator and a feedback resistor are connected in parallel, and which is constituted by a CMOS logic inverter circuit; and a control circuit, which is constituted by a CMOS logic circuit, for clamping input / output levels of the amplifier and halting oscillation before oscillation start-up, unclamping the input / output levels at beginning of oscillation start-up and supplying a pulse signal to an output terminal of the amplifier a prescribed period of time after the beginning of oscillation start-up.

A dual mode, analog differential and complementary metal oxide semiconductor (CMOS) logic circuit is provided. The circuit includes a differential input for receiving a differential input signal. A switch pair is coupled to the differential input. A pair of load resistors coupled to the switch pair defines a differential output for providing a differential output signal. A current source is coupled to the switch pair. A control input receives a control signal and control circuitry coupled to the control input disable the current source to select a CMOS testing mode responsive to the control signal being activated.