The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 12, 2008
Filed:
Mar. 04, 2004
William Mark Siddall, Christchurch, NZ;
William Mark Siddall, Christchurch, NZ;
Tait Electronics Limited, Burnside, Christchurch, NZ;
Abstract
A control loop () for producing an output signal with a stable nominal frequency is provided. The control loop includes inputs for reference () and oscillator () output signals, a beat frequency generator () for producing a signal with a frequency that is the difference between the oscillator and reference signal frequencies, an ADC () to convert the beat frequency to a digital beat frequency signal, an estimator () for estimating the frequency or phase of the beat signal, an adder () for combining an offset and modulation signal and the estimated frequency or phase of the beat signal into an added signal, and a DAC () for generating an analogue control signal for controlling the oscillator output frequency.