Invention Grant
- Patent Title: Frequency divider
- Patent Title (中): 分频器
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Application No.: US10591969Application Date: 2005-03-04
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Publication No.: US07671641B1Publication Date: 2010-03-02
- Inventor: Mustafa Acar , Dominicus Martinus Wilhelmus Leenaerts , Bram Nauta
- Applicant: Mustafa Acar , Dominicus Martinus Wilhelmus Leenaerts , Bram Nauta
- Applicant Address: CH Geneva
- Assignee: ST-Ericsson SA
- Current Assignee: ST-Ericsson SA
- Current Assignee Address: CH Geneva
- Priority: EP04100996 20040311
- International Application: PCT/IB2005/050818 WO 20050304
- International Announcement: WO2005/091506 WO 20050929
- Main IPC: H03B19/00
- IPC: H03B19/00

Abstract:
A frequency divider includes a first latch and a second latch. The first latch is configured to receive a clock signal. The first latch is cross-coupled to the second latch. The second latch includes a circuit configured as a low-pass filter. The second latch further includes a differential pair of transistors. Each of the transistors include a drain, a source and a gate. The gates of the at least two transistors configured to receive a signal generated by the first latch. Additionally, the gates of the at least two other transistors are coupled to a control signal for determining a low-pass characteristic of the second latch.
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