Invention Grant
US07898311B2 Phase shifting circuit which produces phase shift signal regardless of frequency of input signal
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移相电路，无论输入信号的频率如何，均产生相移信号
- Patent Title: Phase shifting circuit which produces phase shift signal regardless of frequency of input signal
- Patent Title (中): 移相电路，无论输入信号的频率如何，均产生相移信号
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Application No.: US12457967Application Date: 2009-06-26
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Publication No.: US07898311B2Publication Date: 2011-03-01
- Inventor: Masafumi Tatewaki
- Applicant: Masafumi Tatewaki
- Applicant Address: JP Kawasaki-shi, Kanagawa
- Assignee: Renesas Elecronics Corporation
- Current Assignee: Renesas Elecronics Corporation
- Current Assignee Address: JP Kawasaki-shi, Kanagawa
- Agency: McGinn Intellectual Property Law Group, PLLC
- Priority: JP2008-174192 20080703
- Main IPC: H03H11/16
- IPC: H03H11/16
Abstract:
A waveform generating circuit includes a constant current circuit that supplies a constant current through a power source; a current mirror circuit that flows an output current that is n times an input current; and a switching circuit that switches a flowing direction of the current in the constant current circuit between the current mirror circuit and the output terminal according to the logical level of the rectangle input signal. The waveform generating circuit generates a triangle wave having a falling slope waveform that is n times the rising slope. On the other hand, the waveform generating circuit that receives an inverted signal of the signal generates a triangle wave and its voltage is compared with another in the comparator to generate an output signal.
Public/Granted literature
- US20100001775A1 Phase shifting circuit which produces phase shift signal regardless of frequency of input signal Public/Granted day:2010-01-07
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