Circuit and method for improving the accuracy of a...

Oscillators – With frequency calibration or testing

Reexamination Certificate

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C331S025000, C331S161000

Reexamination Certificate

active

08049569

ABSTRACT:
A clock generation circuit is provided for improving the accuracy of a low power oscillator circuit contained therein. The clock generation circuit includes a crystal-less oscillator having at least two distinct frequency modes, including a low frequency mode and a high frequency mode. In some cases, the crystal-less oscillator may be adapted to generate a first clock frequency with relatively high accuracy and a second clock frequency with relatively low accuracy. A calibration and control circuit is included within the clock generation circuit for increasing the accuracy of the second clock frequency. In particular, the calibration and control circuit increases accuracy by using the first clock frequency to calibrate the second clock frequency generated by the same crystal-less oscillator. A system comprising the clock generation circuit and methods for operating a crystal-less oscillator having at least two distinct frequency modes are also provided herein.

REFERENCES:
patent: 3600690 (1971-08-01), White
patent: 3725804 (1973-04-01), Langan
patent: 3740588 (1973-06-01), Stratton et al.
patent: 3805245 (1974-04-01), Brooks et al.
patent: 3810036 (1974-05-01), Bloedorn
patent: 3831113 (1974-08-01), Ahmed
patent: 3845328 (1974-10-01), Hollingsworth
patent: 3940760 (1976-02-01), Brokaw
patent: 4061987 (1977-12-01), Nagahama
patent: 4134073 (1979-01-01), MacGregor
patent: 4138671 (1979-02-01), Comer et al.
patent: 4176258 (1979-11-01), Jackson
patent: 4250464 (1981-02-01), Schade, Jr.
patent: 4272760 (1981-06-01), Prazak et al.
patent: 4283713 (1981-08-01), Philipp
patent: 4326135 (1982-04-01), Jarrett et al.
patent: 4344067 (1982-08-01), Lee
patent: 4380083 (1983-04-01), Andersson et al.
patent: 4438404 (1984-03-01), Philipp
patent: 4475151 (1984-10-01), Philipp
patent: 4497575 (1985-02-01), Philipp
patent: 4604363 (1986-08-01), Newhouse et al.
patent: 4608502 (1986-08-01), Dijkmans et al.
patent: 4656603 (1987-04-01), Dunn
patent: 4670838 (1987-06-01), Kawata
patent: 4689740 (1987-08-01), Moelands et al.
patent: 4692718 (1987-09-01), Roza et al.
patent: 4701907 (1987-10-01), Collins
patent: 4727541 (1988-02-01), Mori et al.
patent: 4736097 (1988-04-01), Philipp
patent: 4740966 (1988-04-01), Goad
patent: 4755766 (1988-07-01), Metz
patent: 4773024 (1988-09-01), Faggin et al.
patent: 4794558 (1988-12-01), Thompson
patent: 4802103 (1989-01-01), Faggin et al.
patent: 4802119 (1989-01-01), Heene et al.
patent: 4807183 (1989-02-01), Kung et al.
patent: 4809345 (1989-02-01), Tabata et al.
patent: 4812684 (1989-03-01), Yamagiwa et al.
patent: 4813013 (1989-03-01), Dunn
patent: 4827401 (1989-05-01), Hrustich et al.
patent: 4831546 (1989-05-01), Mitsuta et al.
patent: 4833418 (1989-05-01), Quintus et al.
patent: 4868525 (1989-09-01), Dias
patent: 4876466 (1989-10-01), Kondou et al.
patent: 4876534 (1989-10-01), Mead et al.
patent: 4878200 (1989-10-01), Asghar et al.
patent: 4879461 (1989-11-01), Philipp
patent: 4879688 (1989-11-01), Turner et al.
patent: 4885484 (1989-12-01), Gray
patent: 4907121 (1990-03-01), Hrassky
patent: 4935702 (1990-06-01), Mead et al.
patent: 4939637 (1990-07-01), Pawloski
patent: 4942540 (1990-07-01), Black et al.
patent: 4947169 (1990-08-01), Smith et al.
patent: 4953928 (1990-09-01), Anderson et al.
patent: 4962342 (1990-10-01), Mead et al.
patent: 4964074 (1990-10-01), Suzuki et al.
patent: 4969087 (1990-11-01), Tanagawa et al.
patent: 4970408 (1990-11-01), Hanke et al.
patent: 4972372 (1990-11-01), Ueno
patent: 4977381 (1990-12-01), Main
patent: 4980652 (1990-12-01), Tarusawa et al.
patent: 4999519 (1991-03-01), Kitsukawa et al.
patent: 5043674 (1991-08-01), Bonaccio et al.
patent: 5049758 (1991-09-01), Mead et al.
patent: 5050168 (1991-09-01), Paterson
patent: 5053949 (1991-10-01), Allison et al.
patent: 5055827 (1991-10-01), Philipp
patent: 5059920 (1991-10-01), Anderson et al.
patent: 5068622 (1991-11-01), Mead et al.
patent: 5073759 (1991-12-01), Mead et al.
patent: 5083044 (1992-01-01), Mead et al.
patent: 5088822 (1992-02-01), Warren
patent: 5095284 (1992-03-01), Mead
patent: 5097305 (1992-03-01), Mead et al.
patent: 5099191 (1992-03-01), Galler et al.
patent: 5107146 (1992-04-01), El-Ayat
patent: 5107149 (1992-04-01), Platt et al.
patent: 5109261 (1992-04-01), Mead et al.
patent: 5119038 (1992-06-01), Anderson et al.
patent: 5120996 (1992-06-01), Mead et al.
patent: 5122800 (1992-06-01), Philipp
patent: 5126685 (1992-06-01), Platt et al.
patent: 5127103 (1992-06-01), Hill et al.
patent: 5128871 (1992-07-01), Schmitz
patent: 5136188 (1992-08-01), Ha et al.
patent: 5140197 (1992-08-01), Grider
patent: 5142247 (1992-08-01), Lada et al.
patent: 5144582 (1992-09-01), Steele
patent: 5146106 (1992-09-01), Anderson et al.
patent: 5150079 (1992-09-01), Williams et al.
patent: 5155836 (1992-10-01), Jordan et al.
patent: 5159292 (1992-10-01), Canfield et al.
patent: 5159335 (1992-10-01), Veneruso
patent: 5160899 (1992-11-01), Anderson et al.
patent: 5161124 (1992-11-01), Love
patent: 5165054 (1992-11-01), Platt et al.
patent: 5166562 (1992-11-01), Allen et al.
patent: 5175884 (1992-12-01), Suarez
patent: 5179531 (1993-01-01), Yamaki
patent: 5184061 (1993-02-01), Lee et al.
patent: 5198817 (1993-03-01), Walden et al.
patent: 5200751 (1993-04-01), Smith
patent: 5202687 (1993-04-01), Distinti
patent: 5204549 (1993-04-01), Platt et al.
patent: 5206582 (1993-04-01), Ekstedt et al.
patent: 5220512 (1993-06-01), Watkins et al.
patent: 5225991 (1993-07-01), Dougherty
patent: 5230000 (1993-07-01), Mozingo et al.
patent: 5235617 (1993-08-01), Mallard, Jr.
patent: 5241492 (1993-08-01), Girardeau, Jr.
patent: 5243554 (1993-09-01), Allen et al.
patent: 5245262 (1993-09-01), Moody et al.
patent: 5248843 (1993-09-01), Billings
patent: 5248873 (1993-09-01), Allen et al.
patent: 5258760 (1993-11-01), Moody et al.
patent: 5260592 (1993-11-01), Mead et al.
patent: 5260979 (1993-11-01), Parker et al.
patent: 5270963 (1993-12-01), Allen et al.
patent: 5276407 (1994-01-01), Mead et al.
patent: 5276739 (1994-01-01), Krokstad et al.
patent: 5276890 (1994-01-01), Arai
patent: 5280199 (1994-01-01), Itakura
patent: 5280202 (1994-01-01), Chan et al.
patent: 5289023 (1994-02-01), Mead
patent: 5303329 (1994-04-01), Mead et al.
patent: 5304955 (1994-04-01), Atriss et al.
patent: 5305017 (1994-04-01), Gerpheide
patent: 5305312 (1994-04-01), Fornek et al.
patent: 5307381 (1994-04-01), Ahuja
patent: 5313618 (1994-05-01), Pawloski
patent: 5317202 (1994-05-01), Waizman
patent: 5319370 (1994-06-01), Signore et al.
patent: 5319771 (1994-06-01), Takeda
patent: 5321828 (1994-06-01), Phillips et al.
patent: 5324958 (1994-06-01), Mead et al.
patent: 5325512 (1994-06-01), Takahashi
patent: 5329471 (1994-07-01), Swoboda et al.
patent: 5331215 (1994-07-01), Allen et al.
patent: 5331315 (1994-07-01), Crosette
patent: 5331571 (1994-07-01), Aronoff et al.
patent: 5334952 (1994-08-01), Maddy et al.
patent: 5335342 (1994-08-01), Pope et al.
patent: 5336936 (1994-08-01), Allen et al.
patent: 5339213 (1994-08-01), O'Callaghan
patent: 5339262 (1994-08-01), Rostoker et al.
patent: 5341044 (1994-08-01), Ahanin et al.
patent: 5341267 (1994-08-01), Whitten
patent: 5345195 (1994-09-01), Cordoba et al.
patent: 5349303 (1994-09-01), Gerpheide
patent: 5355097 (1994-10-01), Scott et al.
patent: 5357626 (1994-10-01), Johnson et al.
patent: 5361290 (1994-11-01), Akiyama
patent: 5371524 (1994-12-01), Herczeg et al.
patent: 5371860 (1994-12-01), Mura et al.
patent: 5371878 (1994-12-01), Coker
patent: 5371883 (1994-12-01), Gross et al.
patent: 5374787 (1994-12-01), Miller et al.
patent: 5377333 (1994-12-01), Nakagoshi et al.
patent: 5378935 (1995-01-01), Korhonen et al.
patent: 5381515 (1995-01-01), Platt et al.
patent: 5384467 (1995-01-01), Plimon et al.
patent: 5384745 (1995-01-01), Konishi et al.
patent: 5384910 (1995-01-01), Torres
patent: 5390173 (1995-02-01), Spinney et al.
patent: 5392784 (1995-02-01), Gudaitis
patent: 5394522 (1995-02-01), Sanchez-Frank et al.
patent: 5396245 (1995-03-01), Rempfer
patent: 5398261 (1995-03-01), Marbot
patent: 5399922 (1995-03-01), Kiani et al.
patent: 5408194 (1995-04-01), Steinbach et

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