High frequency GaInP/GaAs heterostructure-emitter bipolar transistor with low offset voltage

1997 ◽  
Vol 33 (8) ◽  
pp. 714 ◽  
Author(s):  
Hai-Jiang Ou ◽  
Chung-Chi Hsu ◽  
Yue-Fei Yang ◽  
E.S. Yang
Keyword(s):  
High Frequency ◽  
Bipolar Transistor ◽  
Offset Voltage ◽  
Low Offset

A High-Breakdown and Low-Offset Voltage InGaP/GaAs Heterostructure Bipolar Transistor for Power System Applications

1999 ◽  
Author(s):  
W. C. Liu ◽  
S. Y. Cheng ◽  
W. C. Wang ◽  
J. Y. Chen ◽  
H. J. Pan ◽  
...  
Keyword(s):  
Power System ◽  
Bipolar Transistor ◽  
Offset Voltage ◽  
Low Offset

Applications of InGaP “Insulator” for High-Breakdown and Low-Offset Voltage Heterostructure Bipolar Transistor

2000 ◽  
Vol 39 (S1) ◽  
pp. 359
Author(s):  
Shiou-Ying Cheng ◽  
Wen-Chau Liu ◽  
Wen-Lung Chang ◽  
Wei-Chou Wang ◽  
Hsi-Jean Pan ◽  
...  
Keyword(s):  
Bipolar Transistor ◽  
Offset Voltage ◽  
Low Offset

scholarly journals An extremely low offset voltage AlInAs/GaInAs heterostructure-emitter bipolar transistor

1998 ◽  
Vol 23 (6) ◽  
pp. 1297-1307 ◽  
Author(s):  
Jung-Hui Tsai ◽  
Shiou-Ying Cheng ◽  
Lih-Wen Laih ◽  
Wen-Chau Liu ◽  
Hao-Hsiung Lin
Keyword(s):  
Bipolar Transistor ◽  
Offset Voltage ◽  
Low Offset

An InP/InGaAs metamorphic δ-doped heterojunction bipolar transistor with high current gain and low offset voltage

2012 ◽  
Vol 521 ◽  
pp. 172-175 ◽  
Author(s):  
Jung-Hui Tsai ◽  
Wen-Shiung Lour ◽  
Yi-Ting Chao ◽  
Sheng-Shiun Ye ◽  
Yung-Chun Ma ◽  
...  
Keyword(s):  
Bipolar Transistor ◽  
Heterojunction Bipolar Transistor ◽  
Current Gain ◽  
High Current ◽  
Offset Voltage ◽  
Low Offset

A High-Resolution and Low Offset Delta-Sigma Analog to Digital Converter for Detecting Photoplethysmography Signal

2021 ◽  
Author(s):  
Eka Fitrah Pribadi ◽  
Rajeev Kumar Pandey ◽  
Paul C.-P. Chao
Keyword(s):  
High Resolution ◽  
Continuous Time ◽  
Operational Amplifier ◽  
High Frequency ◽  
Analog To Digital Converter ◽  
Digital Converter ◽  
Analog To Digital ◽  
Delta Sigma Modulator ◽  
Delta Sigma ◽  
Low Offset

Abstract A high-resolution, low offset delta-sigma analog to digital converter for detecting photoplethysmography (PPG) signal is presented in this study. The PPG signal is a bio-optical signal incorporated with heart functionality and located in the range of 0.1–10 Hz. The location to get PPG signal is on a pulsating artery. Thus the delta-sigma analog-to-digital (DS ADC) converter is designed specifically in that range. However, the DS ADC circuitry suffers from 1/f noise under 10 Hz frequency range. A chopper based operational amplifier is implemented in DS ADC to push the 1/f noise into high-frequency noise. The dc offset of the operational amplifier is also pushed to the high-frequency region. The DS ADC circuitry consists of a second-order continuous-time delta-sigma modulator. The delta-sigma modulator circuitry is designed and simulated using TSMC 180 nm technology. The continuous-time delta-sigma modulator active area layout is 746μm × 399 μm and fabricated using TSMC 180 nm technology. It operates in 100 Hz bandwidth and 4096 over-sampling ratios. The SFDR of the circuit is above 70 dB. The power consumption of the delta-sigma modulator is 35.61μW. The simulation is performed in three different kinds of corner, SS, TT, and FF corner, to guarantee the circuitry works in different conditions.

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