Patent US5751184A successfully refreshed from Google Patents.
US5751184A
Expired / Lapsed
US
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Low electrical power consumption filter circuit
Assignee: Yozan Inc
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Filing: 1996-10-17
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Granted: 1998-05-12
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Expires: 2016-10-17
Abstract
Abstract A low electric power consumption filter circuit includes an amplifying portion including an odd number of serial MOS inverters. A grounded capacitance is connected between an output of the amplifying portion and ground. A pair of balancing resistances connect an output of the MOS inverter to a supply voltage and ground at a previous stage of the last MOS inverter. A feedback impedance connects an output of the amplifying portion to its input. An input impedance is connected to the input of the amplifying portion.
Inventors
- 👤 Guoliang Shou
- 👤 Makoto Yamamoto
- 👤 Sunao Takatori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:17
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/04; H03H11/12; H03H11/1217
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
99 words
A filter circuit comprising: i) an amplifying portion including an odd number of serial MOS inverters; ii) a grounded capacitance being connected between an output portion of said amplifying portion and the ground; iii) balancing resistances including a pair of resistances connecting an input portion of a last MOS inverter of said MOS inverters to a supply voltage and the ground; iv) a first feedback impedance connecting said output portion of said amplifying portion to its input portion; and v) a first input impedance being connected to said input portion of said amplifying portion for receiving an input signal.
Claim 2
Dependent Claim
99 words
A filter circuit comprising: i) an amplifying portion including an odd number of serial MOS inverters; ii) a grounded capacitance being connected between an output portion of said amplifying portion and the ground; iii) balancing resistances including a pair of resistances connecting an input portion of a last MOS inverter of said MOS inverters to a supply voltage and the ground; iv) a first feedback impedance connecting said output portion of said amplifying portion to its input portion; and v) a first input impedance being connected to said input portion of said amplifying portion for receiving an input signal.
Claim 3
Dependent Claim
42 words
A filter circuit as claimed in claim 1, wherein said input impedance is a first resistance and said first feedback impedance includes a second resistance and capacitance being parallelly connected between said input portion and said output portion of said amplifying portion.
Claim 4
Dependent Claim
32 words
A filter circuit as claimed in claim 1, wherein said input impedance is a serial circuit of a first resistance and a capacitance, and said first feedback impedance is a second resistance.
Claim 5
Dependent Claim
49 words
A filter circuit as claimed in claim 1, wherein a second input impedance is connected to an input portion of said first input impedance, and a second feedback impedance is provided for connecting said output portion of said amplifying portion to said input portion of said first input impedance.
Claim 6
Dependent Claim
18 words
A filter circuit as claimed in claim 1, wherein said amplifying portion comprises three stages of MOS inverters.
Claim 7
Dependent Claim
130 words
A filter circuit comprising: filter stages being serially connected, each of said filter stages comprising: i) an amplifying portion including an odd number of serial MOS inverters, ii) a grounded capacitance connected between an output portion of said amplifying portion and the ground, iii) said balancing resistances including a pair of resistances connecting an input portion of a last MOS inverter of said MOS inverters to a supply voltage and the ground, iv) a feedback impedance connecting said output portion of said amplifying portion to its input portion, and v) an input impedance connected to said input portion of said amplifying portion; and a filter circuit feedback impedance connecting an output portion of the last filter stage to an input portion of an amplifying portion of the first filter stage.
Claim 8
Dependent Claim
130 words
A filter circuit comprising: filter stages being serially connected, each of said filter stages comprising: i) an amplifying portion including an odd number of serial MOS inverters, ii) a grounded capacitance connected between an output portion of said amplifying portion and the ground, iii) said balancing resistances including a pair of resistances connecting an input portion of a last MOS inverter of said MOS inverters to a supply voltage and the ground, iv) a feedback impedance connecting said output portion of said amplifying portion to its input portion, and v) an input impedance connected to said input portion of said amplifying portion; and a filter circuit feedback impedance connecting an output portion of the last filter stage to an input portion of an amplifying portion of the first filter stage.
Claim 9
Dependent Claim
16 words
A filter circuit as claimed in claim 6, wherein number of said filter portions is three.
Claim 10
Dependent Claim
75 words
A filter circuit as claimed in claim 6, wherein said feedback impedance of the first filter stage is a parallel circuit of a first resistance and a first capacitance, said input impedance thereof is a second resistance, said feedback impedance of the second filter stage is a second capacitance, said feedback impedance and said input impedance of the third filter stage are third and fourth resistances, and said filter feedback impedance is a fifth resistance.
References Cited (Backward Citations)
US4057766A
Cited
US5631941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-05-11 | 2001-11-10 | 2002-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-11 | 2005-11-10 | 2006-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-11 | 2009-11-10 | 2010-05-12 | $7700.00 | Window Closed / Lapsed |