Crystal oscillator programmable with frequency-defining paramete

Details Crystal oscillator programmable with frequency-defining paramete Crystal oscillator programmable with frequency-defining paramete

1997-02-05

1999-09-14

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

With reference oscillator or source

331 16, 331158, 331179, H03B 532, H03L 706, H03L 718

Patent

active

059528907

ABSTRACT:
A programmable crystal oscillator is provided having a memory for storing frequency-defining parameters. Typically, one of these parameters is used to program an adjustable capacitive load circuit coupled to a crystal to thereby adjust the crystal source frequency. Additional parameters are used to program the output frequency of a phase locked loop circuit coupled to receive the adjusted source frequency. A further parameter can also be used to divide the output frequency of the phase locked loop circuit to supply a specified output frequency. The oscillators can be manufactured as generic programmable crystal oscillators without regard for output frequency and then quickly programmed to produce customer-specified output frequencies with a high degree of accuracy.

REFERENCES:
patent: 4020425 (1977-04-01), Hoffmann et al.
patent: 4320357 (1982-03-01), Wulfsberg et al.
patent: 4343219 (1982-08-01), Uetrecht
patent: 4459566 (1984-07-01), Lane
patent: 4468636 (1984-08-01), Monticelli
patent: 4486846 (1984-12-01), McCallister et al.
patent: 4590941 (1986-05-01), Saulson et al.
patent: 4689581 (1987-08-01), Talbot
patent: 4835491 (1989-05-01), Coster
patent: 4984155 (1991-01-01), Geier et al.
patent: 5053723 (1991-10-01), Schemmel
patent: 5063358 (1991-11-01), Vale et al.
patent: 5142247 (1992-08-01), Lada, Jr. et al.
patent: 5150079 (1992-09-01), Williams et al.
patent: 5216595 (1993-06-01), Protheroe
patent: 5262735 (1993-11-01), Hashimoto et al.
patent: 5302920 (1994-04-01), Bitting
patent: 5323125 (1994-06-01), Hiben et al.
patent: 5349544 (1994-09-01), Wright et al.
patent: 5446420 (1995-08-01), Westwick
patent: 5451912 (1995-09-01), Torode
patent: 5457433 (1995-10-01), Westwick
patent: 5465076 (1995-11-01), Yamauchi et al.
patent: 5467373 (1995-11-01), Ketterling
patent: 5548252 (1996-08-01), Watanabe et al.
patent: 5563554 (1996-10-01), Mizuno
patent: 5570066 (1996-10-01), Eberhardt et al.
patent: 5579231 (1996-11-01), Sudou et al.
patent: 5636346 (1997-06-01), Saxe
patent: 5668506 (1997-09-01), Watanabe et al.
D. Soderquist, "Digitally programmed oscillator is suitable for .mu.P control", Electronic Design 13, Jun. 21, 1997, pp. 102-104.
A. Foord, "Voltage controlled oscillator," Radio and Electronics Constructor, vol. 28, No. 10, pp. 590-595, May 1975.
T.G. Giles, "A universal frequency synthesizer IC," Philips Telecommunication Review, vol. 37, No. 3, Aug. 1979, pp. 177-181.
Cypress Semiconductor Marketing Brochure "Graphics Frequency Synthesizers" Published Nov., 1993, pp. 5-7, a publication of Cypress Semiconductor, San Jose, California.
IC Designs, "Satellite Oscillator," Model No. ICD2031A Preliminary Data Sheet May 1991.
IC Designs, "Programmable Clock Oscillator," Model No. ICD2053A Programmable Products.
IC Designs, "Frequency Multiplier," Model No. ICD2032 Preliminary Data Sheet, May 1991.
"ICD6233 Characterization Data," & "Dutycycle Data", 1994; 32 pages 1994.
IC Designs, "Dual Programming Clock Oscillator," Model No. ICD2051, May 1991.
MF Electronics Corp., "Phase Locked VCXO 10 MHz to 32.768 MHz," 1994., 1 page.
MF Electronics Corp., "20 to 200 MHz Programmable ECL," 1994, pp. 18-20.
M-Tron "MV Series VCXO Oscillators," 1994, 1 page.
M-Tron, "MV Series VCXO Oscillators," 1995, 1 page.
Vectron Labs., "Sonet Clock Recovery Module SCRM-622," Nov. 94., 4 pages.
Wenzel Associates Inc., "Custom Oscillator Configurations." 1 page.
Connor-Winfield Corp., "SM PECL PLL Frequency Multiplier," 1995., 2 pages.
Epson, "Programmable Multi-Output Crystal Oscillator MG-5010," Mar. 7, 1993., 3 pages.
M-Tron, "MT1135 Series Dual Baud Rate Generators," 1987., 2 pages.
Hybrids International, Ltd., "Voltage Controlled Crystal Oscillators," pp. VCX-1 to VCX-3, 1995.
National Semiconductor, "IMX2306/2316/2326 PLLatinum Low Power Frequency Synthesizer for RF Personal Communications," Jan. 1998., 18 pages.
Hybrids International, Ltd., "Frequency Products," Sep. 23, 1994, 1 page.
MF Electronics Corp., "Voltage Controlled Oscillators 1 MHz to 175 MHz," 1994, p. 9.
Hybrids International, Ltd., "Product Summary," Aug. 1993., 1 page.
Hybrids International, Ltd., "Crystal Oscillators: Voltage Controlled," pp. VC-1 to VC-3, Mar. 1993.
Cypress-Semiconductor Corporation, "One-Time Programmable Clock-Oscillator ICD6233," Apr. 1995, 3 pages.
Fox Electronics, "F3000/HCMOS/TTL Tri-State Enable/Disable Oscillator," 1992, 2 pages.
Fox Electronics, "F6053A/Tri-State HCMOS Programmable Clock Oscillator," 1993, 4 pages.
Fox Electronics, "F6151/Tri-State Dual Programmable Clock Oscillator," 1993, 4 pages.
Fox Electronics, "Programmable Crystal Oscillators for R.F. Applications," 1993, 2 pages.
Fox Electronics, Frequency Control Products Catalog, 1995-96; vol. XVI, pp. 1-72.
W. Ooms, "Improved Frequency Synthesizer," Motorola Technical Disclosure Bulletin, vol. 6, No. 1, pp. 4-6, Oct. 1, 1986, Schaumbourg, Illinois, USA.
E. Mielke, "Programmierbarer 50-MHz-Muttertaktimpulsegenerator," Radio Fernsehen Elektronik, vol. 39, No. 9, pp. 560-563, Jan. 1, 1990, Berlin, Germany.

Affiliated with

Also associated with

Rating

Crystal oscillator programmable with frequency-defining paramete does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Crystal oscillator programmable with frequency-defining paramete, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Crystal oscillator programmable with frequency-defining paramete will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1513845