Search Results - "Ko, Sangsoo"

A 14-nm 0.14-psrms Fractional-N Digital PLL With a 0.2-ps Resolution ADC-Assisted Coarse/Fine-Conversion Chopping TDC and TDC Nonlinearity Calibration by Chih-Wei Yao, Ronghua Ni, Chung Lau, Wanghua Wu, Godbole, Kunal, Yongrong Zuo, Sangsoo Ko, Nam-Seog Kim, Sangwook Han, Ikkyun Jo, Joonhee Lee, Juyoung Han, Daehyeon Kwon, Chulho Kim, Shinwoong Kim, Sang Won Son, Cho, Thomas Byunghak

“…A digital fractional-N phase-locked loop (PLL) is presented. It achieves 137and 142-fs rms jitter integrating from 10 kHz to 10 MHz and from 1 kHz to 10 MHz,…”
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K- and Q-bands CMOS frequency sources with X-band quadrature VCO by KO, Sangsoo, KIM, Jeong-Geun, SONG, Taeksang, YOON, Euisik, HONG, Songcheol

“…Fully integrated 10-, 20-, and 40-GHz frequency sources are presented, which are implemented with a 0.18-/spl mu/m CMOS process. A 10-GHz quadrature…”
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Design and Analysis of an Ultra-Wideband Automatic Self-Calibrating Upconverter in 65-nm CMOS by KANG, Byoungjoong, YIM, Jounghyun, KIM, Taewan, KO, Sangsoo, KO, Won, SHIN, Heeseon, RYU, Inhyo, YANG, Sung-Gi, BAE, Jong-Dae, PARK, Hojin

“…In this paper, an ultra-wideband (UWB) upconverter is proposed that has automatic self-calibrating circuits for the in-phase/quadrature mismatch correction and…”
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Design and Analysis of a Cascode Bipolar Low-Noise Amplifier With Capacitive Shunt Feedback Under Power-Constraint by KANG, Byoungjoong, YU, Jinhyuck, SHIN, Heeseon, KO, Sangsoo, KO, Won, YANG, Sung-Gi, CHOO, Wooseung, PARK, Byeong-Ha

“…A cascode bipolar low-noise amplifier (LNA) with capacitive shunt feedback has been developed to present a solution for simultaneous noise and power match when…”
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Balanced topology to cancel Tx leakage in CW radar by KIM, Jeong-Geun, KO, Sangsoo, JEON, Sanghoon, PARK, Jae-Woo, HONG, Songcheol

“…Balanced topology in radar front-end is presented, which can reduce Tx leakage to receiver drastically. The balanced radar front-end which is composed of a…”
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Noise property of a quadrature balanced VCO by Sangsoo Ko, Hong, S.

“…A quadrature balanced voltage controlled oscillator (B-VCO) with current source switching is proposed and analyzed. This letter shows analytically that the…”
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Ku-band InGaP-GaAs HBT MMIC VCOs with balanced and differential topologies by Baek, D., Ko, S., Kim, J.-G., Kim, D.-W., Hong, S.

“…Balanced and differential voltage controlled oscillators (VCOs) are investigated with analytic noise models. Fully integrated VCOs in Ku-band are implemented…”
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Low-noise fractional-N PLL design with mixed-mode triple-input LC VCO in 65nm CMOS by Yuanfeng Sun, Xueyi Yu, Woogeun Rhee, Sangsoo Ko, Wooseung Choo, Byeong-Ha Park, Zhihua Wang

“…This paper presents a low-noise ΔΣ fractional-N PLL utilizing a mixed-mode triple-input LC VCO. An analog dual-path VCO control relaxes the nonlinearity…”
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A 65nm CMOS low-noise three band group WiMedia UWB receiver by Won Ko, Heeseon Shin, Sangsoo Ko, Jounghyun Yim, Byoungjoong Kang, Taewan Kim, Inhyo Ryu, Sung-Gi Yang, Jong-Dae Bae, Hojin Park

“…A low-noise and high-gain ultra wideband (UWB) receiver was developed using a 65 nm CMOS technology and a wafer-level fabricated package. In order to enhance…”
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A WiMedia UWB transmitter up to 9GHz in 65nm CMOS and Wafer-Level Fabricated Package by Jounghyun Yim, Byoungjoong Kang, Taewan Kim, Won Ko, Heeseon Shin, Sangsoo Ko, Inhyo Ryu, Sung-Gi Yang, Jong-Dae Bae, Hojin Park

“…A 3.1-4.7GHz and 6.3-9GHz RF transmitter fabricated in a 65nm CMOS technology and packaged with a Wafer-level Fabricated Package (WFP) is presented. For high…”
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A nonquasi-static table-based small-signal model of heterojunction bipolar transistor by Ko, Sangsoo, Koh, Kyungmin, Park, Hyun-Min, Hong, Songcheol

“…A nonquasi-static table-based (NQS-TB) small-signal model, which has been used successfully in modeling FETs, is applied to a heterojunction bipolar transistor…”
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Digital PLL design challenges for cellular RFICs by Sangsoo Ko, Chih-Wei Yao, Joonhee Lee, Sangwook Han, Daehyeon Kwon, Wing Fai Loke, Ronghua Ni, Cho, Thomas Byunghak

“…Digital PLL design challenges for cellular RFICs are presented. 5 digital PLLs are integrated in 28nm CMOS to support 3-Rx carrier aggregation (CA)/2-TxCA of…”
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Dual-Path LC VCO Design With Partitioned Coarse-Tuning Control in 65 nm CMOS by Sun, Yuanfeng, Yu, Xueyi, Rhee, Woogeun, Ko, Sangsoo, Choo, Wooseung, Park, Byeong-Ha, Wang, Zhihua

“…This letter describes a dual-path LC voltage controlled oscillator (VCO) design that reduces both coarse-tuning and fine-tuning sensitivities. By using a…”
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An X-band CMOS quadrature balanced VCO by KO, Sangsoo, HUI DONG LEE, KANG, Dong-Woo, HONG, Songcheol

“…A new quadrature balanced voltage controlled oscillator (B-VCO) is presented. The quadrature and single B-VCO with identical components are implemented in 0.18…”
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A single-chip CDMA-2000 zero-IF transceiver for band-class 4 with GPS support by Sung-Gi Yang, Ji-Ho Ryu, Byoungjoong Kang, Heeseon Shin, Jinhyuck Yu, Sangsoo Ko, Won Ko, Dong-Jin Keum, Wooseung Choo, Byeong-Ha Park

“…A single-chip cdma-2000 zero-IF transceiver has been successfully developed for band-class 4 (Korean-PCS band) with an additional GPS signal receiving…”
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A 14-nm 0.14-ps rms Fractional-N Digital PLL With a 0.2-ps Resolution ADC-Assisted Coarse/Fine-Conversion Chopping TDC and TDC Nonlinearity Calibration by Yao, Chih-Wei, Ni, Ronghua, Lau, Chung, Wu, Wanghua, Godbole, Kunal, Zuo, Yongrong, Ko, Sangsoo, Kim, Nam-Seog, Han, Sangwook, Jo, Ikkyun, Lee, Joonhee, Han, Juyoung, Kwon, Daehyeon, Kim, Chulho, Kim, Shinwoong, Son, Sang Won, Cho, Thomas Byunghak

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20 GHz integrated CMOS frequency sources with a quadrature VCO using transformers by KO, Sangsoo, KIM, Jeong-Geun, SONG, Taeksang, YOON, Euisik, HONG, Songcheol

“…A fully integrated 20 GHz frequency source is implemented with a VCO and a doubler in a 0.18 /spl mu/m CMOS process. A 10 GHz quadrature voltage controlled…”
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An Ultra-wideband transmitter with automatic self-calibration of sideband rejection up to 9 GHz in 65nm CMOS by Byoungjoong Kang, Jounghyun Yim, Taewan Kim, Heeseon Shin, Sangsoo Ko, Won Ko, Inhyo Ryu, Sung-Gi Yang, Wooseung Choo, Byeong-Ha Park

“…An Ultra-wideband (UWB) transmitter is proposed that can correct phase errors in quadrature local (LO) signals automatically without help of baseband processor…”
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24.8 A 14nm fractional-N digital PLL with 0.14psrms jitter and −78dBc fractional spur for cellular RFICs by Chih-Wei Yao, Wing Fai Loke, Ronghua Ni, Yongping Han, Haoyang Li, Godbole, Kunal, Yongrong Zuo, Sangsoo Ko, Nam-Seog Kim, Sangwook Han, Ikkyun Jo, Joonhee Lee, Juyoung Han, Daehyeon Kwon, Chulho Kim, Shinwoong Kim, Sang Won Son, Cho, Thomas Byunghak

“…To meet ever-growing demands for higher mobile data-rates, LTE standards continue to evolve. While carrier aggregation (CA) improves data-rates, it requires…”
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A CMOS VCO with Optimized Tune Branches for Zero-IF CDMA Cellular Application in a 0.5μm BiCMOS process by Jinhyuck Yu, Sung-Gi Yang, Sangsoo Ko, Woonyun Kim, Wooseung Choo, Byeong-Ha Park

“…A fully integrated, very-low phase-noise CMOS voltage controlled oscillator (VCO) has been implemented for zero-IF CDMA cellular receiver (Rx) using CMOS…”
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