BRYAN THOMAS MILLIREN
Pilots at High Rd, Plum Island, MA
License number
Massachusetts A4292685
Issued Date
Aug 2015
Expiration Date
Aug 2017
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
21 High Rd, Plum Island, MA 01951
Professional information
High Stability Double Oven Crystal Oscillator
US Patent:
2006019, Aug 31, 2006
Filed:
Feb 25, 2006
Appl. No.:
11/362649
Inventors:
Bryan Milliren - Newbury MA, US
Roger Clark - Windham NH, US
Roger Clark - Windham NH, US
International Classification:
H03B 5/32
US Classification:
331158000
Abstract:
A double oven crystal oscillator (DOCXO) is disclosed which is highly stable by incorporating means to reduce the effects of ambient pressure changes on the frequency of the oscillator. The oscillator crystal is mounted in a temperature controlled inner oven to reduce the effects on the frequency stability of the oscillator. The oscillator circuitry and all circuitry associated with the inner oven is mounted in good thermal contact with the inner oven. A Faraday shield at ground potential is placed over the oscillator circuitry to minimize the effects of stray capacitance between the oscillator components and the case wall of the inner oven. The effects of minor deformations in the case walls within the oscillator caused by ambient pressure changes and other factors causing pressure changes are thereby greatly minimized. To further reduce effects on oscillator frequency stability the ovens of the DOCXO are temperature controlled, cases are hermetically sealed, the case walls are rigid, and ovens and cases may be evacuated.