The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Dalam makalah ini fungsi pemindahan sistem dengan penyepaduan arus bertingkap dibincangkan. Penyepaduan jenis ini biasanya digunakan dalam pengadun pensampelan dan arus dijana oleh penguat transkonduktans (TA). Kapasiti parasit (Cp) dan rintangan keluaran TA (Ro, TA) sebelum pengadun pensampelan sangat mempengaruhi prestasi. Pengiraan berdasarkan model termasuk kapasitans parasit dan rintangan keluaran TA dijalankan. Keputusan pengiraan menunjukkan bahawa disebabkan oleh kapasitansi parasit, satu takuk pada kekerapan pensampelan muncul, yang sangat berbahaya kerana ia menyebabkan keuntungan berhampiran kekerapan pensampelan berkurangan dengan banyak. Rintangan keluaran TA menjadikan kedalaman takuk cetek dan mengurangkan keuntungan berhampiran kekerapan pensampelan. Untuk menyekat kesan daripada Cp and Ro, TA, penguat kendalian diperkenalkan selari dengan kemuatan pensampelan (Cs). Hasil simulasi menunjukkan terdapat peningkatan keuntungan sebanyak 17 dB manakala Cs ialah 1,pF, gm ialah 9,mS, N ialah 8 dengan kadar jam 800,MHz.
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Salinan
Ning LI, Win CHAIVIPAS, Kenichi OKADA, Akira MATSUZAWA, "Analysis of CMOS Transconductance Amplifiers for Sampling Mixers" in IEICE TRANSACTIONS on Electronics,
vol. E91-C, no. 6, pp. 871-878, June 2008, doi: 10.1093/ietele/e91-c.6.871.
Abstract: In this paper the transfer function of a system with windowed current integration is discussed. This kind of integration is usually used in a sampling mixer and the current is generated by a transconductance amplifier (TA). The parasitic capacitance (Cp) and the output resistance of the TA (Ro,TA) before the sampling mixer heavily affect the performance. Calculations based on a model including the parasitic capacitance and the output resistance of the TA is carried out. Calculation results show that due to the parasitic capacitance, a notch at the sampling frequency appears, which is very harmful because it causes the gain near the sampling frequency to decrease greatly. The output resistance of the TA makes the depth of the notches shallow and decreases the gain near the sampling frequency. To suppress the effect of Cp and Ro,TA, an operational amplifier is introduced in parallel with the sampling capacitance (Cs). Simulation results show that there is a 17 dB gain increase while Cs is 1,pF, gm is 9,mS, N is 8 with a clock rate of 800,MHz.
URL: https://global.ieice.org/en_transactions/electronics/10.1093/ietele/e91-c.6.871/_p
Salinan
@ARTICLE{e91-c_6_871,
author={Ning LI, Win CHAIVIPAS, Kenichi OKADA, Akira MATSUZAWA, },
journal={IEICE TRANSACTIONS on Electronics},
title={Analysis of CMOS Transconductance Amplifiers for Sampling Mixers},
year={2008},
volume={E91-C},
number={6},
pages={871-878},
abstract={In this paper the transfer function of a system with windowed current integration is discussed. This kind of integration is usually used in a sampling mixer and the current is generated by a transconductance amplifier (TA). The parasitic capacitance (Cp) and the output resistance of the TA (Ro,TA) before the sampling mixer heavily affect the performance. Calculations based on a model including the parasitic capacitance and the output resistance of the TA is carried out. Calculation results show that due to the parasitic capacitance, a notch at the sampling frequency appears, which is very harmful because it causes the gain near the sampling frequency to decrease greatly. The output resistance of the TA makes the depth of the notches shallow and decreases the gain near the sampling frequency. To suppress the effect of Cp and Ro,TA, an operational amplifier is introduced in parallel with the sampling capacitance (Cs). Simulation results show that there is a 17 dB gain increase while Cs is 1,pF, gm is 9,mS, N is 8 with a clock rate of 800,MHz.},
keywords={},
doi={10.1093/ietele/e91-c.6.871},
ISSN={1745-1353},
month={June},}
Salinan
TY - JOUR
TI - Analysis of CMOS Transconductance Amplifiers for Sampling Mixers
T2 - IEICE TRANSACTIONS on Electronics
SP - 871
EP - 878
AU - Ning LI
AU - Win CHAIVIPAS
AU - Kenichi OKADA
AU - Akira MATSUZAWA
PY - 2008
DO - 10.1093/ietele/e91-c.6.871
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E91-C
IS - 6
JA - IEICE TRANSACTIONS on Electronics
Y1 - June 2008
AB - In this paper the transfer function of a system with windowed current integration is discussed. This kind of integration is usually used in a sampling mixer and the current is generated by a transconductance amplifier (TA). The parasitic capacitance (Cp) and the output resistance of the TA (Ro,TA) before the sampling mixer heavily affect the performance. Calculations based on a model including the parasitic capacitance and the output resistance of the TA is carried out. Calculation results show that due to the parasitic capacitance, a notch at the sampling frequency appears, which is very harmful because it causes the gain near the sampling frequency to decrease greatly. The output resistance of the TA makes the depth of the notches shallow and decreases the gain near the sampling frequency. To suppress the effect of Cp and Ro,TA, an operational amplifier is introduced in parallel with the sampling capacitance (Cs). Simulation results show that there is a 17 dB gain increase while Cs is 1,pF, gm is 9,mS, N is 8 with a clock rate of 800,MHz.
ER -