Invention Grant
- Patent Title: High pass filter chip
- Patent Title (中): 高通滤芯
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Application No.: US12549994Application Date: 2009-08-28
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Publication No.: US07825722B2Publication Date: 2010-11-02
- Inventor: Tsong-Chi Huang
- Applicant: Tsong-Chi Huang
- Applicant Address: TW Taipei County
- Assignee: Princeton Technology Corporation
- Current Assignee: Princeton Technology Corporation
- Current Assignee Address: TW Taipei County
- Agency: Muncy, Geissler, Olds & Lowe, PLLC
- Priority: TW97136300A 20080922
- Main IPC: H03K5/00
- IPC: H03K5/00

Abstract:
A high pass filter chip with a large size capacitor is disclosed. The high pass filter chip includes a fully-differential sensing device circuit. The fully differential sensing device circuit includes a first amplifier circuit, a second amplifier circuit, and a miller capacitor module including a third amplifier. The first amplifier circuit includes a first transistor and a second transistor, in which the base of the first transistor is coupled to the base of the second transistor. The second amplifier circuit includes a third transistor and a fourth transistor, in which the base of the third transistor is coupled to the base of the fourth transistor. A first input terminal of the third amplifier is coupled to the base of the second transistor of the first amplifier circuit, and a second terminal of the amplifier is coupled to the base of the third transistor of the second amplifier circuit.
Public/Granted literature
- US20100073089A1 HIGH PASS FILTER CHIP Public/Granted day:2010-03-25
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