Patent application number | Description | Published |
20080198913 | Equalizer - Methods and apparatus to provide an equalizer for analog adaptive control are disclosed. An example equalizer described herein includes a high frequency amplifier to receive an input signal and to amplify a high frequency portion of the input signal, a low frequency amplifier to receive the input signal and to amplify a low frequency portion of the input signal, and a weight factor controller to control a gain of the high frequency amplifier and a gain of the low frequency amplifier. | 08-21-2008 |
20090043926 | BIDIRECTIONAL DATA REPEATER SWITCH - A bidirectional repeater and data multiplexer for serial data has A-side | 02-12-2009 |
20090135895 | Self-calibrated adaptive equalization system and methods of performing the same - A self-calibrating, adaptive equalization system for generating an ideal digital signal is disclosed. The adaptive equalization system includes an equalizer and a high-gain buffer. The equalizer includes a first equalizer loop that feeds-back a control voltage to the equalizer and the high-gain buffer that includes a second equalizer loop that feeds-back a high-pass-to-low-pass filter ratio signal. Each of the first and second equalizer loops has a high-pass and a low-pass filter, rectifying circuits for each of the filters, and an integrating circuit that compares signal energy output from the rectifiers. The adaptive equalization system generates an ideal digital signal. | 05-28-2009 |
20100090772 | OSCILLATOR WITH DELAY COMPENSATION - In the many microelectronics applications, delays present in circuitry can affect both the design and the function of the circuitry. One example of delays impacting the function of a circuit is a relaxation oscillator, where delays present in comparator circuits and latches can cause its frequency to vary beyond desired ranges. Here, a relaxation circuit with delay compensation is described. | 04-15-2010 |
20110102083 | HIGH PERFORMACE LVDS DRIVER FOR SCALABLE SUPPLY - Traditionally, complementary metal oxide semiconductor (CMOS) and bipolar transistors have been separately employed in low voltage differential signal (LVDS) drivers. Here, a hybridized LVDS driver is provided with an input stage that uses CMOS transistors and output stages that use bipolar transistors. As a result of this hybridization, the LVDS driver has superior functional characteristics compared to conventional LVDS drivers as well as being able to function with a supply range between about 1.8V and 3.3V. | 05-05-2011 |
20110199130 | LOW-POWER HIGH-SPEED DIFFERENTIAL DRIVER WITH PRECISION CURRENT STEERING - In bipolar CMOS or BiCMOS process technologies, drivers (such as mixed mode or hybrid mode drivers) using both bipolar and CMOS transistors (i.e., field effect transistors or FETs) may have undesirable properties, such as reduced speed, ringing, latch-up, or lower electrostatic discharge (ESD) performance. Here, a mixed or hybrid mode driver is provided that employs a current steering circuit (instead of voltages driven differential pair(s) as is done with conventional drivers) to generate pull-down currents that precisely match the voltages in the pull-up portions of driver. It increases the speed and produces smaller output common-mode voltage fluctuation over conventional drivers. Thus, the driver provided here can be produced in BiCMOS process technologies without the undesirable effects of conventional drivers. | 08-18-2011 |
20120086489 | ADAPTIVE QUADRATURE CORRECTION FOR QUADRATURE CLOCK PATH DESKEW - Quadrature clocking schemes are widely used in modern communications systems, but often suffer from phase imbalance. Conventional solutions that attempt to address this phase imbalance, however, are generally large and use a substantial amount of power. Here, however, a correction circuit is provided that can locally correct for phase imbalance without the need for bulky and high power consuming circuitry. | 04-12-2012 |
20120275122 | USING A COUPLING ORTHOGONALIZATION APPROACH TO REDUCE CROSS-TALK - An apparatus is provided. The apparatus generally comprises a plurality of pairs of differential transmission lines. The plurality of pairs of differential transmission lines includes a set of pairs of differential transmission lines with each pair of differential transmission lines from the set of pairs of differential transmission lines including at least one twist to alternate current direction. Also, the plurality of differential transmission lines are arranged such that alternating current directions substantially eliminate cross-talk across the plurality of pairs of differential transmission lines. | 11-01-2012 |
20130107933 | LINEAR SYSTEM FOR LINK TRAINING | 05-02-2013 |
20140159814 | DIFFERENTIAL RECEIVER - A differential receiver with reduced common mode induced propagation delay variance. One implementation of a differential receiver includes a first differential amplifier, a second differential amplifier, and a first current source. The first differential amplifier includes a first transistor pair. The second differential amplifier includes a second transistor pair. The first current source is coupled to a drain node of a first transistor of the first transistor pair. The first current source is configured to generate a variable first current at the drain node as of function of a sum of a variable tail current of the first differential amplifier and a variable tail current of the second differential amplifier. | 06-12-2014 |
20140346887 | GALVANIC ISOLATOR - A system on a package (SOP) can include a galvanic isolator. The galvanic isolator can include an input stage configured to transmit an input RF signal in response to receiving an input modulated signal. The galvanic isolator can also include a resonant coupler electrically isolated from the input stage by a dielectric. The resonant coupler can be configured to filter the input RF signal and transmit an output RF signal in response to the input RF signal. The galvanic isolator can further include an output stage electrically isolated from the resonant coupler by the dielectric. The output stage can be configured to provide an output modulated signal in response to receiving the output RF signal. | 11-27-2014 |
20150070111 | SYSTEM FOR TRANSMITTING INFORMATION BETWEEN CIRCUITS - A system for transferring information from a first circuit to a second circuit includes first and second isolation elements coupled between the first circuit and the second circuit. A first transient filter is located on the second circuit and coupled to the first isolation element. A second transient filter is located on the second circuit and coupled to the second isolation element. A first ground is located on the first circuit, and a second ground is located on the second circuit. The first ground electrically floats relative to the second ground. | 03-12-2015 |
20150070949 | DEVICE FOR TRANSFERING POWER FROM A FIRST CIRCUIT TO A SECOND CIRCUIT - A power transfer system for transferring power from a first circuit to a second circuit by a differential signal generated in the first circuit includes a first isolation element for transmitting a first component of the differential signal between the first and second circuits. The system also includes a second isolation element for transmitting a second component of the differential signal between the first and second circuits. A digital rectifier is coupled to the first and second isolation elements for generating a rectified voltage in response to the first and second components of the differential signal. The system includes circuitry for monitoring the rectified voltage and generating a signal representative of the rectified voltage. The system also includes a controller for changing the rectified voltage in response to the signal representative of the rectified voltage. | 03-12-2015 |
20150071380 | METHOD AND CIRCUITRY FOR TRANSMITTING DATA - Data transfer devices and methods for transferring data between first and second circuits are disclosed. A data transfer device includes a first circuit having a plurality of data channels, wherein at least one of the data channels is an active data channel. A serializer has a plurality of inputs and an output, wherein the inputs are coupled to the plurality of data channels. The serializer is for coupling only one active channel at a time to the output. An isolation barrier is coupled to the output of the serializer, the isolation attenuates transients and passes the fundamental frequency. A second circuit includes a deserializer having an input and at least one output, the input is coupled to the isolation barrier, the at least one output is at least one active data channel. | 03-12-2015 |