Koichi Hamashita

1.2k total citations
45 papers, 844 citations indexed

About

Koichi Hamashita is a scholar working on Biomedical Engineering, Electrical and Electronic Engineering and Cellular and Molecular Neuroscience. According to data from OpenAlex, Koichi Hamashita has authored 45 papers receiving a total of 844 indexed citations (citations by other indexed papers that have themselves been cited), including 44 papers in Biomedical Engineering, 43 papers in Electrical and Electronic Engineering and 5 papers in Cellular and Molecular Neuroscience. Recurrent topics in Koichi Hamashita's work include Analog and Mixed-Signal Circuit Design (44 papers), CCD and CMOS Imaging Sensors (29 papers) and Advancements in Semiconductor Devices and Circuit Design (21 papers). Koichi Hamashita is often cited by papers focused on Analog and Mixed-Signal Circuit Design (44 papers), CCD and CMOS Imaging Sensors (29 papers) and Advancements in Semiconductor Devices and Circuit Design (21 papers). Koichi Hamashita collaborates with scholars based in Japan, United States and Netherlands. Koichi Hamashita's co-authors include Un-Ku Moon, Kazuki Sobue, Seiji Takeuchi, Gábor C. Temes, Benjamin Hershberg, Skyler Weaver, K. Takasuka, Bang‐Sup Song, Yun-Shiang Shu and Eric Swanson and has published in prestigious journals such as IEEE Journal of Solid-State Circuits, IEEE Transactions on Circuits and Systems I Regular Papers and Journal of the Audio Engineering Society.

In The Last Decade

Koichi Hamashita

42 papers receiving 818 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Koichi Hamashita Japan 17 808 786 48 47 22 45 844
M. Waltari Finland 13 722 0.9× 643 0.8× 73 1.5× 32 0.7× 58 2.6× 39 744
Carlos A. De La Cruz‐Blas Spain 14 486 0.6× 472 0.6× 35 0.7× 49 1.0× 13 0.6× 74 550
Robert van Veldhoven Netherlands 12 465 0.6× 442 0.6× 43 0.9× 64 1.4× 7 0.3× 26 505
Patrick Loumeau France 10 391 0.5× 361 0.5× 42 0.9× 41 0.9× 19 0.9× 70 445
A. Marques Belgium 9 704 0.9× 665 0.8× 61 1.3× 33 0.7× 18 0.8× 23 745
Jirayuth Mahattanakul Thailand 11 442 0.5× 413 0.5× 37 0.8× 28 0.6× 15 0.7× 50 483
D. Kelly United States 11 768 1.0× 714 0.9× 74 1.5× 36 0.8× 8 0.4× 12 788
Seyed Javad Azhari Iran 14 504 0.6× 467 0.6× 52 1.1× 42 0.9× 5 0.2× 67 542
Pavan Kumar Hanumolu United States 10 514 0.6× 343 0.4× 39 0.8× 19 0.4× 20 0.9× 25 557
R.T. Baird United States 7 733 0.9× 725 0.9× 62 1.3× 19 0.4× 12 0.5× 11 766

Countries citing papers authored by Koichi Hamashita

Since Specialization
Citations

This map shows the geographic impact of Koichi Hamashita's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Koichi Hamashita with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Koichi Hamashita more than expected).

Fields of papers citing papers by Koichi Hamashita

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Koichi Hamashita. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Koichi Hamashita. The network helps show where Koichi Hamashita may publish in the future.

Co-authorship network of co-authors of Koichi Hamashita

This figure shows the co-authorship network connecting the top 25 collaborators of Koichi Hamashita. A scholar is included among the top collaborators of Koichi Hamashita based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Koichi Hamashita. Koichi Hamashita is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
He, Tao, et al.. (2022). A Hybrid Continuous-Time Incremental and SAR Two-Step ADC With 90.5-dB DR Over 1-MHz BW. IEEE Solid-State Circuits Letters. 5. 122–125. 14 indexed citations
2.
3.
Sobue, Kazuki, et al.. (2019). A 10-mW 16-b 15-MS/s Two-Step SAR ADC With 95-dB DR Using Dual-Deadzone Ring Amplifier. IEEE Journal of Solid-State Circuits. 54(12). 3410–3420. 51 indexed citations
4.
Sobue, Kazuki, et al.. (2019). A 951-fsrms Period Jitter 3.2% Modulation Range in-Band Modulation Spread-Spectrum Clock Generator. IEEE Journal of Solid-State Circuits. 55(2). 426–438. 5 indexed citations
5.
Sobue, Kazuki, et al.. (2018). A 1.25MS/S Two-Step Incremental ADC with 100DB DR and 110DB SFDR. 205–206. 13 indexed citations
6.
Sobue, Kazuki, et al.. (2018). A 1.25 MS/s Two-Step Incremental ADC With 100-dB DR and 110-dB SFDR. IEEE Solid-State Circuits Letters. 1(11). 207–210. 7 indexed citations
7.
Hamashita, Koichi, et al.. (2017). An 11-Bit 250-nW 10-kS/s SAR ADC With Doubled Input Range for Biomedical Applications. IEEE Transactions on Circuits and Systems I Regular Papers. 65(1). 61–73. 48 indexed citations
8.
9.
Hershberg, Benjamin, Skyler Weaver, Kazuki Sobue, et al.. (2012). A 61.5dB SNDR pipelined ADC using simple highly-scalable ring amplifiers. 32–33. 17 indexed citations
10.
Hershberg, Benjamin, Skyler Weaver, Kazuki Sobue, et al.. (2012). Ring Amplifiers for Switched Capacitor Circuits. IEEE Journal of Solid-State Circuits. 47(12). 2928–2942. 157 indexed citations
11.
Maghari, Nima, et al.. (2010). Design of a 79 dB 80 MHz 8X-OSR Hybrid Delta-Sigma/Pipelined ADC. IEEE Journal of Solid-State Circuits. 45(4). 719–730. 30 indexed citations
12.
Wang, Yan, Koichi Hamashita, & Gábor C. Temes. (2009). Hybrid delta-sigma ADC. Analog Integrated Circuits and Signal Processing. 63(2). 293–298. 1 indexed citations
13.
Hamashita, Koichi, et al.. (2009). A fifth-order gm–c continuous-time Δ Σ modulator with process-insensitive input linear range. IEEE Journal of Solid-State Circuits. 44(9). 2381–2391. 16 indexed citations
14.
Hamashita, Koichi, et al.. (2008). A Noise-Coupled Time-Interleaved Delta-Sigma ADC With 4.2 MHz Bandwidth, ${-}$98 dB THD, and 79 dB SNDR. IEEE Journal of Solid-State Circuits. 43(12). 2601–2612. 52 indexed citations
15.
Takeuchi, Seiji, et al.. (2007). A 1.8V 36-mW 11-bit 80MS/s pipelined ADC using capacitor and opamp sharing. 240–243. 7 indexed citations
16.
Ahn, Gil‐Cho, Dong-Young Chang, Koichi Hamashita, et al.. (2005). A 0.6v 82dB ΔΣ audio ADC using switched-RC integrators. 166–168. 4 indexed citations
17.
Ahn, Gil‐Cho, Dong-Young Chang, Koichi Hamashita, et al.. (2005). A 0.6-V 82-dB delta-sigma audio ADC using switched-RC integrators. IEEE Journal of Solid-State Circuits. 40(12). 2398–2407. 65 indexed citations
18.
Hamashita, Koichi & Eric Swanson. (2002). A single-chip stereo audio codec. 42. 28.4.1–28.4.4. 1 indexed citations
19.
Fujimori, Ichiro, Koichi Hamashita, & Eric Swanson. (1992). A Fifth-Order Delta-Sigma Modulator with 110 dB Audio-Band Dynamic Range. Journal of the Audio Engineering Society. 4 indexed citations
20.
Swanson, Eric, et al.. (1989). A Stereo 16-Bit Delta-Sigma A/D Converter for Digital Audio. Journal of the Audio Engineering Society. 37(6). 476–486. 43 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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