Invention Grant
- Patent Title: Current source, electronic apparatus, and integrated circuit
- Patent Title (中): 电流源，电子设备和集成电路
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Application No.: US12923326Application Date: 2010-09-15
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Publication No.: US08446139B2Publication Date: 2013-05-21
- Inventor: Yasunori Tsukuda
- Applicant: Yasunori Tsukuda
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agency: Rader, Fishman & Grauer PLLC
- Priority: JP2009-230295 20091002
- Main IPC: G05F1/40
- IPC: G05F1/40
Abstract:
Disclosed herein is a current source, including: a current control oscillator configured to output an oscillation signal of a frequency dependent on an input current; a comparator configured to compare the oscillation signal with a reference signal; a charge pump configured to output a current dependent on a comparison result by the comparator; a low-pass filter configured to include a smoothing capacitor charged and discharged by an output current of the charge pump; a loop converter configured to be connected to the smoothing capacitor and generate a current dependent on a voltage generated by the smoothing capacitor to supply the current as the input current to the current control oscillator; and an output converter configured to be connected to the low-pass filter and generate a current dependent on a voltage generated in the low-pass filter to output the current as an output current.
Public/Granted literature
- US20110080145A1 Current source, electronic apparatus, and integrated circuit Public/Granted day:2011-04-07
Information query
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