Browsing by Author "Chen, Chia-Pei"

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A Low-Power 2.4-GHz CMOS GFSK Transceiver With a Digital Demodulator Using Time-to-Digital Conversion
(2009-12-01)
Chen, Chia-Pei
;
Yang, Ming-Jen
;
Huang, Hsun-Hsiu
;
Chiang, Tung-Ying
;
Chen, Jheng-Liang
A technique of time-to-digital conversion is utilized in a digital demodulator for a low-power 2.4-GHz CMOS GFSK transceiver. The proposed time-to-digital converter (TDC) employs a self-sampling technique and an auto-calibration algorithm to avoid edge synchronization problems and the need of a delay-locked loop (DLL). With the TDC, a limiter and a digital demodulator can be employed simultaneously in the receiver to achieve low power consumption and high performance. Additionally, in the transmitter, the open-loop VCO modulation is adopted to save hardware and power consumption. The transmitter frequency drift in open-loop modulation and frequency offset between the receiver and the transmitter can be easily resolved by the proposed receiver architecture. All required building blocks of the proposed transceiver, except a RF matching network and a crystal, were implemented on a 4-mm(2) chip by a 0.18-mu m CMOS process. The receiver achieves -89-dBm sensitivity at 0.1% BER with 1-Mb/s data rate, and the transmitter delivers up to 0-dBm output power. The receiver and transmitter consume 13.3 mA and 10.7 mA, respectively, from a 1.8-V power supply.
A single-chip low-power tunable CMOS low-IF single-conversion ISM receiver
(2005)
Chen, Chia-Pei
;
Li, Simon C.
;
Kao, Hong-Sing
;
Su, Chung-Chih
;
Wen, Kuei-Ann
A single-chip tunable CMOS low-IF single-conversion receiver operated in the 915-MHz ISM band is proposed. A new 10.7-MHz IF section including a limiting amplifier and FM/FSK demodulator is employed. Near IF section sensitivity of -72 dBm, the demodulation constant of FM/FSK demodulator is 15 mV/kHz and the dynamic range of the limiting amplifier reaches 80dB. With on-chip tunable components in low power LNA and LC-tank VCO circuit, the receiver measures a RF gain of 15dB at 915-MHz, sensitivity of -80dBm at 0.1% BER, IIP3 of -9dBm, and NF of 5dB with current consumption of 33mA and a chip area of 6 mm(2).
A tunable fully integrated low-power Low-IF rx for 2.4 GHz ISM wireless applications
(2007-01-01)
Chen, Chia-Pei
;
Kao, Hong-Sing
;
Li, Simon Cimin
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
A fully integrated single conversion CMOS low-IF receiver for 2.4-GHz ISM band is proposed. With on-chip tunable components in low power LNA and LC-tank VCO circuit, the receiver measures a RF gain of 35dB at 2.4-GHz, sensitivity of -87 dBm at 0.1% BER, IIP3 of -10 dBm, and NF of 4.9 dB with current consumption of 31 mA and a chip area of 8.12 mm(2).
A tunable fully integrated low-power Low-IF rx for 2.4 GHz ISM wireless applications
(2007-01-01)
Chen, Chia-Pei
;
Kao, Hong-Sing
;
Li, Simon Cimin
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
A fully integrated single conversion CMOS low-IF receiver for 2.4-GHz ISM band is proposed. With on-chip tunable components in low power LNA and LC-tank VCO circuit, the receiver measures a RF gain of 35dB at 2.4-GHz, sensitivity of -87 dBm at 0.1% BER, IIP3 of -10 dBm, and NF of 4.9 dB with current consumption of 31 mA and a chip area of 8.12 mm(2).