Comparison and decision circuit in amplitude keying signal demodulation circuit module |
Title: |
Comparison and decision circuit in amplitude keying signal demodulation circuit module |
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Application Number: |
200610001367 |
Application Date: |
2006/01/20 |
Announcement Date: |
2006/07/19 |
Pub. Date: |
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Publication Number: |
1805416 |
Announcement Number: |
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Grant Date: |
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Granted Pub. Date: |
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ApplicationType: |
Invention |
State/Country: |
11[China|beijing] |
IPC: |
H04L 27/06, G06K 7/00 |
Applicant(s): |
Tsinghua University |
Inventor(s): |
Bai Rongrong, Li Yongming, Zhang Chun, Wang Zhihua |
Key Words: |
Comparison and decision circuit, amplitude keying signal demodulation circuit module |
Abstract: |
The invention relates to a compare and decide circuit of amplitude key-control signal demodulation circuit, belonging to the analogue signal process and radio frequency recognize technique. Said circuit comprises: a differential coefficient circuit, a reference voltage generation circuit, a hysteresis comparator circuit, and a bias voltage generate circuit. Wherein, said differential coefficient circuit is formed by a PMOS tube, a NMOS tube and a capacitor said reference voltage generation circuit is formed by a PMOS tube, a NMOS tube and a capacitor. The invention can solve the problem that modulation depth is too shallow of the modulation signal sent from the Reader to the Tag in RFID protocol (as ISO/IEC FDIS 18000-6 protocol), and it can simple structure, small and high sensitivity. |
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