Patent application number | Description | Published |
20090121910 | Method and System for a Control Scheme on Power and Common-Mode Voltage Reduction for a Transmitter - Provided is a method and system for controlling current characteristics in a transceiver having a transmitter. The method includes identifying a phase control signal from an adjacent current cell preceding the particular current cell in time and logically ORing the phase control signal from the preceding cell with a phase control signal from the particular current cell. | 05-14-2009 |
20100080271 | METHOD AND SYSTEM FOR A CONTROL SCHEME ON POWER AND COMMON-MODE VOLTAGE REDUCTION FOR A TRANSMITTER - Provided is a method and system for controlling current characteristics in a transceiver having a transmitter. The transmitter includes a plurality of current cells. Each cell is configurable for operating in different modes. The method includes determining a first probability associated with transmitting data at a particular symbolic level and determining a second probability associated with each cell being used during a transmission at the particular symbolic level. Next, one of the modes for each cell is selected in accordance with anticipated performance requirements. An average current of the transmitter is then calculated based upon the determined first and second probabilities and the selected modes. | 04-01-2010 |
20110133967 | High Speed Latch Comparators - In a latch circuit having a bistable pair of cross connected transistors of a first polarity and a third transistor of a second polarity, a current signal greater than a bias current is received at a latch circuit port, amplified with the third transistor, and applied to the latch circuit port. This decreases the time in which the latch circuit port receiving the current signal greater than the bias current reaches a steady state voltage. | 06-09-2011 |
20120032722 | Offset Calibration for Amplifiers - An apparatus, a method, and a system are provided to calibrate an offset in an amplifier. The apparatus can include an amplifier, a voltage control unit, a comparator, and a processing unit. The amplifier can have four terminals: a positive differential input (V | 02-09-2012 |
20140084970 | LOW-POWER ETHERNET TRANSMITTER - An electrical circuit comprising a line driver for providing Ethernet signals is disclosed. The line driver comprises a voltage mode line driver for producing 1000BT and 100BT Ethernet signals and an active output impedance line driver arranged parallel to the voltage mode line driver. The line driver is capable of producing 1000BT or 100BT or 10BT Ethernet signals, wherein either the voltage mode line driver or the active impedance line driver is active. | 03-27-2014 |
20150085412 | OVERVOLTAGE PROTECTION CIRCUIT WITH DIGITAL CONTROL - A device for digitally protecting against an overvoltage event may include a front-end circuit, an overvoltage protection circuit, and a protection switch. The protection switch may be coupled to the overvoltage protection circuit and may be configured to decouple the front-end circuit from an external medium, in response to a clamp signal. The overvoltage protection circuit may be configured to detect the overvoltage event at one or more nodes of a circuit. In response to the detection of the overvoltage event, the overvoltage protection circuit may generate the clamp signal to activate the protection switch. | 03-26-2015 |
20150149654 | Modular Analog Frontend - A system may include a first stage comprising first signaling components for a first protocol, and a second stage comprising second signaling components for the first protocol and a second protocol. The system may further include logic configured to receive an incoming data stream, and determine a stream protocol for the data stream. The logic may be further configured to, responsive to the determination, activate the at least a portion of the first stage when the stream protocol is compliant with the first protocol, and when the stream protocol is compliant with the second protocol, deactivate the first stage. | 05-28-2015 |
20160065230 | GAIN CALIBRATION OF ADC RESIDUE AMPLIFIERS - A device for gain calibration of an analog-to-digital converter (ADC) residue amplifier includes a digital-to analog converter (DAC) configured to convert a digital signal to an analog signal. The DAC includes a calibration capacitor that can be used in the gain calibration of the ADC residue amplifier. A flash ADC, including a plurality of comparators and an additional comparator, generates the digital signal. The additional comparator provides a threshold voltage approximately in a middle point of a nominal subrange. The nominal subrange comprises a portion of a voltage range corresponding to threshold voltages of two adjacent comparators of the plurality of comparators. | 03-03-2016 |
20160105195 | Parallel Sample-and-Hold Circuit for a Pipelined ADC - A parallel sample-and-hold circuit includes a sampling switch and a hold capacitor for each of the ADC and MDAC of a converter stage for a pipelined ADC. Each sampling switch couples the analog input of the first converter stage to its hold capacitor at the time a sample is desired to be taken. After the sample is placed on the hold capacitor, the sampling switch is opened and the hold capacitor stores the sample. To compensate for mismatches in the signal paths of these sample-and-hold circuits, a compensation switch is further used. The compensation switch couples the terminals of the hold capacitors together, creating a parallel sample-and-hold circuit. The compensation switch is controlled such that it is closed after the sampling switches are opened to equalize a voltage of the samples. | 04-14-2016 |