Class / Patent application number | Description | Number of patent applications / Date published |
327358000 | Having feedback | 9 |
20100127756 | ADAPTIVE BIAS CIRCUIT - Disclosed are apparatus and methods for electronic signal conversion in which a power level of the signal is used to adjust the bias current of a converter. | 05-27-2010 |
20100264978 | SIGNAL CONVERSION SYSTEM FOR SENDING OR RECEIVING A RADIOFREQUENCY SIGNAL - System for converting a radiofrequency signal S | 10-21-2010 |
20110057709 | PADE' APPROXIMANT BASED COMPENSATION FOR INTEGRATED SENSOR MODULES AND THE LIKE - Methods and systems using Pade' Approximant expansion ratios provide mappings between nonlinear sensors and a more linear output domain. The method includes a method of converting an input digital signal having a nonlinear dependency on a physical variable into an output digital signal that exhibits a substantially linear dependency with respect to the variable is disclosed. The method includes: (a) multiplying the input digital signal by a variable multiplying factor to thereby generate a multiplied digital version of the input signal; (b) adding to the multiplied digital version of the input signal, a predefined digital offset signal to thereby produce the output digital signal; (c) multiplying the output digital signal by a predefined feedback gain correction factor to thereby produce a digital feedback signal; (d) using the digital feedback signal to produce the variable multiplying factor. | 03-10-2011 |
20120154015 | ANALOG MULTIPLIER - An exemplary embodiment of an analog multiplier may include a voltage controlled resistance circuit, a first transistor and a second transistor, where the resistance of the voltage controlled resistance circuit is based upon a first input voltage. The current passing through the voltage controlled resistance circuit is based upon a second input voltage. The first transistor and the second transistor form a current mirror to mirror the current passing through the voltage controlled resistance circuit to provide a power supply control current to a wideband code division multiple access radio frequency power amplifier. | 06-21-2012 |
20120268191 | DIGITAL PRE-DISTORTION - A pre-distortion circuit that may introduce a pre-distortion signal in a communication channel by determining a harmonic signal of the signal to be output. One or more image correction signals of the signal to be output may be determined. The one or more image correction signals may be complex conjugate signal variations of the signal to be output. The harmonic signal, the one or more image correction signals and the signal to be output may be combined into a combined output signal. The combined output signal may be transmitted to a digital-to-analog converter. The predistortion circuit may be implemented in a FPGA, an ASIC, a digital-to-analog converter, and/or a separate IC package. | 10-25-2012 |
20130169342 | DEVICE AND METHOD FOR REMOVING HARMONIC COMPONENTS - An apparatus of a Harmonic Rejection Mixer (HRM) for removing a harmonic component and an operating method thereof are provided. The HRM includes a Local Oscillator (LO), at least one frequency converter, at least two mixers, at least one phase converter, and a combiner. The LO generates an LO signal. The at least one frequency converter multiplies the LO signal using different variables to provide the same to at least two mixers. The at least two mixers convert a frequency band of an input signal using the LO signal provided from the LO and the at least one frequency converter. The at least one phase converter controls a phase of an output signal of at least one other mixer excluding one of the at least two mixers. The combiner combines an output signal of the one mixer with an output signal of the at least one phase converter. | 07-04-2013 |
20130222041 | HIGH FREQUENCY MIXER WITH TUNABLE DYNAMIC RANGE - A high frequency mixer with a tunable dynamic range is disclosed. One embodiment provides a mixer apparatus including multiple first transistors at an input branch that receive a differential radio frequency (RF) signal, and multiple second transistors at a second branch that receive a differential local oscillator (LO) signal. The second transistors generate an intermediate frequency (IF) differential output signal. The bias current that flows at the input branch and the output branch can be independently adjusted to allow the conversion gain, linearity, or the output noise of the mixer to be controlled. | 08-29-2013 |
20130278321 | Method and Apparatus for Mixer-Based Harmonic Rejection - In one aspect, the present invention exploits the termination conductances of a time-discrete harmonic mixer as another degree of freedom in configuring the mixer to meet given harmonic rejection performance requirements while using reduced number of unit cells. The values of these termination conductances are purposefully configured to introduce a desired non-linearity in quantization of the mixer transconductance by the unit cells. The non-uniform quantization produces a non-linear fitting of the transconductance levels to the transconductance points defining the target sinusoidal waveform. As a consequence of its termination conductance configuration, the contemplated mixer achieves levels of harmonic rejection with that would not be met if the reduced number of unit cells operated with uniform quantization. As a further advantage, the manipulated conductance values generally are lower than those used in conventional designs, e.g., on par with the maximum conductance of the mixer, as provided by mixer's set of unit cells. | 10-24-2013 |
20140043087 | HIGH ACCURACY BIPOLAR CURRENT MULTIPLIER WITH BASE CURRENT COMPENSATION - A bipolar current multiplier apparatus and method includes a group of negative feedback loop circuits for compensating base current loss, and multiple bipolar devices that communicate electronically with the negative feedback loop circuits, wherein the bipolar devices are responsive to base currents capable of being self-cancelled due to a presence of the negative feedback loop circuits, thereby ensuring that an output is stabilized over temperature and process variations while providing for a wide input dynamic range. In some embodiments, the bipolar current multiplier apparatus can be associated with a preamplifier for a hard disk drive to calculate the output power associated with a power driver that controls the flying height of read/write heads of the hard disk drive. | 02-13-2014 |