Samsung Electronics Co., Ltd.

Thomas Byung-Hak Cho

Jong-woo Lee

Seung-hyun Oh

Seung-Chul Lee

Jun-Seok Yang

Ji-seon Paek

Hyung-Sun Lim

Jae-Hyun Lim

Jun-Hee Jung

Su-Seob Ahn

So-Young Kang

Hee-Seon Shin

Jong-Mi Lee

Min-Gyu Jo

Provided is a reconfigurable amplifier. The reconfigurable amplifier includes a gain circuit including a gain path configured to amplify an input signal, and a feed forward circuit including a feed forward path configured to receive the input signal and perform feed forward compensation on the input signal, and a first control circuit configured to perform the feed forward compensation in a first mode by activating the feed forward path, and deactivate the feed forward path in a second mode different from the first mode.

Multimode reconfigurable amplifier and analog filter including the same

An analog amplifier for recovering an abnormal operation of a common-mode feedback is provided. An analog variable amplifier includes a first input transistor and a second input transistor, a first output transistor and a second output transistor, a third transistor and a fourth transistor, a first current source, a fifth transistor and a sixth transistor, and a second current source. The first input transistor and the second input transistor amplify a bias current depending on a magnitude of a first input voltage and a second input voltage. The first output transistor and the second output transistor output the amplified bias current. The third transistor and the fourth transistor receive an output voltage of the first output transistor as an input and amplifying the received output voltage. The first current source provides a predetermined current between the first output transistor and the third transistor.

Analog amplifier for recovering abnormal operation of common mode feedback

A semiconductor device is provided that includes a first chip that generates a single signal by connecting a first signal line and a second signal line, to which differential signals are respectively provided, and outputs the single signal to a third signal line. The first chip is driven by a first power supply voltage. The semiconductor device also includes a second chip comprising an analog-to-digital converter (ADC) that receives the single signal through the third signal line, compares the single signal with a reference voltage, and outputs a digital signal based on the comparison. The semiconductor device also includes a controller that monitors the digital signal and adjusts the reference voltage to be approximately equivalent to the first power supply voltage.

Semiconductor device performing common mode voltage compensation using analog-to-digital converter

A semiconductor device and operating method thereof are provided. The semiconductor device includes a mode controller configured to output a control signal of a first level in a first mode, and output a control signal of a second level that is different from the first level in a second mode that is different from the first mode; and a successive approximation register analog-to-digital converter (SAR ADC) configured to convert an analog input signal into a digital output signal using a plurality of variable sampling capacitors, wherein each of the plurality of variable sampling capacitors comprises a first sampling capacitor having a first capacitance, and a second sampling capacitor having a second capacitance, wherein, in the first mode, the SAR ADC is configured to receive the control signal of the first level and connect the first sampling capacitor and the second sampling capacitor to either of a first voltage and a second voltage that is different from the first voltage to convert the analog input signal into the digital output signal, and wherein, in the second mode, the SAR ADC is configured to receive the control signal of the second level and connect any one of the first sampling capacitor and the second sampling capacitor to either of the first voltage and the second voltage to convert the analog input signal into the digital output signal.

Semiconductor device comprising successive approximation register analog to digital converter with variable sampling capacitor

A transmitter in a wireless communication system is provided. The transmitter includes a baseband signal processor for detecting an envelope signal, a supply modulator (SM) for producing power to be supplied to a power amplifier using the detected envelope signal, and the power amplifier for receiving voltage from the SM and for amplifying power of a transmit signal. The SM generates a compensation signal corresponding to switching noise generated via switching amplification, and adds the compensation signal and the switching noise. The amplifier of the wireless communication system can produce low switching noise, and the envelope tracking power amplifier can prevent reception degradation due to the noise of the supply modulator.

Apparatus and method for removing noise of power amplifier in mobile communication system

Provided is an apparatus for analog-digital converting that includes a Most Significant Bit (MSB)-Digital Analog Converter (DAC) for converting a digital signal into an analog signal, a trim capacitor, a Least Significant Bit (LSB)-DAC, coupled to the trim capacitor, for converting a digital signal into an analog signal, a bridge capacitor connecting the MSB-DAC and the LSB-DAC, a comparator for measuring a voltage value at the MSB-DAC and LSB-DAC and outputting a result of comparing with a sampled voltage value, and a controller for generating first measurement data by digital converting a first measurement value output from the comparator by applying a reference voltage to a unit capacitor of the MSB-DAC, for generating second measurement data by digital converting a second measurement value output from the comparator by applying the reference voltage to the LSB-DAC, and controlling the trim capacitor by comparing the first and second measurement data.

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Gyeonggi-do, South Korea

Thomas Byung-Hak Cho