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Oscillator temperature compensation method and integrated circuit and temperature compensated oscillator unit

A temperature compensation, integrated circuit technology, applied in power oscillators, electrical components, digital transmission systems, etc., can solve problems such as increasing space, and achieve the effect of good accuracy

Active Publication Date: 2019-06-11
MICRO ANALOG SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem is that improving the accuracy of temperature error compensation also increases the space required by the necessary components on the integrated circuit

Method used

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  • Oscillator temperature compensation method and integrated circuit and temperature compensated oscillator unit
  • Oscillator temperature compensation method and integrated circuit and temperature compensated oscillator unit
  • Oscillator temperature compensation method and integrated circuit and temperature compensated oscillator unit

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Embodiment Construction

[0070] In the oscillator temperature compensation solution of the invention, the idea is to use a summation function consisting of local compensation basis functions in the oscillator temperature error compensation.

[0071] The summation function f(T) for oscillator temperature error compensation can be as follows:

[0072] f(T)=α 0 φ 0 (x)+α 1 φ 1 (x)+...+α k φ k (x),

[0073] Among them, φ 0 ≡1, and where the local compensating basis function φ j , j=0, . . . , k are linearly independent and form the subspace M basis.

[0074] According to the foundations of linear algebra, all conventional functions such as exponential functions, sine and cosine functions, and arc functions can be used as subspace basis functions. In addition, among the subspace basis functions, at least an arctangent function, a function, a polynomial function, and a hyperbolic tangent function can be used as the local compensation basis function.

[0075] image 3 An integrated circuit for osc...

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Abstract

The present invention relates in general to electronic oscillation generators and to the stabilization of electronic oscillation generators, and especially to temperature- compensated oscillator units used in electronics and telecommunications technology, for example, as well as to a method and integrated circuit for temperature compensation of oscillators. The temperature-compensated oscillator unit according to the invention that comprises an integrated circuit (12) and oscillator (10) is characterised in that said oscillator (10) has a known temperature compensation function and that said integrated circuit (12) of the oscillator unit comprises a temperature compensation block (14) having at least two local compensation basis functions ϕ j ,,j = 0,..., k for selection for at least one oscillator (10) of a specific type, an internal temperature sensor (11) and a data block (13) for calibrating said temperature compensation block (14) in the temperature range to be used, and several differential pairs, with which the temperature compensation of the oscillator (10) is implemented.

Description

technical field [0001] The present invention generally relates to electronic oscillation generators and stabilization of electronic oscillation generators, in particular temperature compensated oscillator units such as used in electronics and telecommunication technology, and methods and integrated circuits for temperature compensation of oscillators. Background technique [0002] Oscillators are widely used in electronics and telecommunications as very stable and precise frequency sources. Oscillators include crystal oscillators or micromechanical oscillators, so-called MEMS oscillators (MEMS, microelectromechanical systems). In a voltage controlled crystal oscillator (VCXO), the nominal oscillation frequency can be adjusted in response to a voltage control input. The frequency accuracy of a crystal oscillator is affected by many variables such as temperature, aging, control levels, monitoring and oscillation. The quartz crystal of a conventional crystal oscillator has co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03L1/02H03H3/007H03H3/013H03B5/04H03J3/04
CPCH03B5/04H03B5/368H03J3/04H03L1/025H03L1/028H04L2027/0016
Inventor E·利格内尔J·奥尔
Owner MICRO ANALOG SYST
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