Patent application number | Description | Published |
20090027098 | Phase shift circuit with lower intrinsic delay - A phase shift circuit that includes two, rather than four, delay chains and corresponding selectors is described. This provides a significant area savings and reduces the intrinsic delay of the phase shift circuit, which is particularly beneficial for embodiments in which there is no intrinsic delay matching. In one specific implementation, the phase shift circuit includes a first delay circuit and a matching delay circuit. The first delay circuit provides a first delay that includes a first intrinsic delay and a first intentional delay. The delay matching circuit provides a matching delay that matches the first intrinsic delay. In one specific implementation, the phase shift circuit also includes a second delay circuit to provide a second delay that includes a second intrinsic delay and second intentional delay, where the second intrinsic delay matches the first intrinsic delay and the second intentional delay is half as long as the first intentional delay. Matching the intrinsic delay of the first delay circuit allows for comparing its output against a delayed version of the input signal, rather than the input signal. As a result, Fmax, the maximum frequency of the input signal at which the phase shift circuit may operate, is not limited by the intrinsic delay or by Fmin, the minimum frequency of the input signal at which the phase shift circuit may operate. | 01-29-2009 |
20090261862 | Techniques For Measuring Voltages in a Circuit - A circuit can include a comparator, a resistor divider, a control circuit, and a multiplexer. The comparator compares an internal supply voltage of the circuit to a selected reference voltage. The resistor divider generates reference voltages. The control circuit receives an output signal of the comparator and generates a select signal. The multiplexer transmits one of the reference voltages from the resistor divider to the comparator as the selected reference voltage in response to the select signal. | 10-22-2009 |
20100073060 | PHASE SHIFT CIRCUIT WITH LOWER INTRINSIC DELAY - A phase shift circuit that includes two, rather than four, delay chains and corresponding selectors is described. This provides a significant area savings and reduces the intrinsic delay of the phase shift circuit, which is particularly beneficial for embodiments in which there is no intrinsic delay matching. In one implementation, the phase shift circuit includes a first delay circuit and a matching delay circuit. The first delay circuit provides a first delay that includes a first intrinsic delay and a first intentional delay. The delay matching circuit provides a matching delay that matches the first intrinsic delay. In one implementation, the phase shift circuit also includes a second delay circuit to provide a second delay that includes a second intrinsic delay and second intentional delay, where the second intrinsic delay matches the first intrinsic delay and the second intentional delay is half as long as the first intentional delay. | 03-25-2010 |
20110204924 | Techniques For Measuring Voltages in a Circuit - A circuit includes a comparator, a resistor divider, a control circuit, a multiplexer, and a programmable gain amplifier. The comparator is operable to measure an internal voltage of the circuit based on a selected reference voltage. The resistor divider is operable to generate reference voltages. The control circuit is operable to generate a select signal based on an output signal of the comparator. The multiplexer is operable to select one of the reference voltages from the resistor divider as the selected reference voltage based on the select signal. The programmable gain amplifier is configurable to generate a compensation voltage to compensate for an offset voltage of the comparator. The compensation voltage is provided to an input of the comparator. | 08-25-2011 |
20110292950 | Input/Output Interface For Periodic Signals - A first periodic signal generation circuit generates first periodic output signals. A second periodic signal generation circuit generates second periodic output signals. A first multiplexer circuit receives the first and the second periodic output signals. An interface circuit coupled to external pins generates a third periodic output signal based on a periodic signal selected by the first multiplexer circuit. A second multiplexer circuit receives the third periodic output signal at an input. A first periodic feedback signal provided to the first periodic signal generation circuit is based on a signal selected by the second multiplexer circuit. A third multiplexer circuit receives the third periodic output signal at an input. A second periodic feedback signal provided to the second periodic signal generation circuit is based on a signal selected by the third multiplexer circuit. | 12-01-2011 |
20120229169 | Techniques For Measuring Voltages in a Circuit - A circuit includes a comparator, a programmable current source, and a control circuit. The comparator is operable to compare an internal supply voltage of the circuit to a reference voltage. The programmable current source is operable to supply a first current for the reference voltage. The control circuit is operable to control the first current through the programmable current source based on an output signal of the comparator. | 09-13-2012 |
20130274715 | Method and System for Eustachian Tube Dilation - A device and method for dilating a Eustachian tube of a patient is disclosed. The device includes a guide catheter and a balloon dilation catheter. The balloon dilation catheter has an actuator that prevents injury to the middle ear. The balloon dilation catheter is slidably coupled with the guide catheter through the guide catheter lumen and is fully inserted into the guide catheter lumen when the distal side of the actuator is adjacent to the proximal end of the guide catheter. The method involves advancing the guide catheter and balloon dilation catheter through a nasal passage of the patient to dilate a portion of the Eustachian tube. | 10-17-2013 |
20140277059 | APPARATUS FOR PUNCTURING BALLOON IN AIRWAY DILATION SHAFT - A dilation system includes a balloon catheter and a puncturing assembly. The balloon catheter includes a shaft, a dilator coupled to a distal end of the shaft, and a lumen extending through the shaft and the dilator. The dilator is expandable from a collapsed state to an expanded state. The puncturing assembly includes at least one cutting member. The puncturing assembly is positionable within the lumen of the balloon catheter or along an exterior of the shaft when the puncturing assembly is in a first position. The puncturing assembly transitions to a second position to puncture the lumen of the balloon catheter and/or to puncture the dilator, to thereby drain fluid from the dilator. | 09-18-2014 |