Variable capacitance integrated electronic circuit module

Abstract

A digitally controlled variable capacitance integrated electronic circuit module (100) comprises a set of basic cells in a matrix arrangement. Each basic cell itself comprises a functional block (11) which can be switched between two individual capacitance values, a control block (12), and a control junction connecting the control block and the functional block of said basic cell. The functional blocks and the control blocks are grouped into separate regions (110, 120) of the matrix arrangement, to reduce capacitive interaction between output paths and power supply paths of the module. The functional blocks can still be switched in a winding path order within the matrix arrangement. A module of the invention can be used in an oscillator capable of producing a signal at 4 GHz.

Description

technical field [0001] The invention relates to a digitally controlled variable capacitance integrated electronic circuit module. The present invention also relates to a variable frequency oscillator including such a module, and a mobile phone terminal including the oscillator. Background technique [0002] Many electronic circuit applications require the implementation of capacitive components with variable values. Specifically, the capacitive component can be numerically controlled so that its capacitive value is controlled by a digitized control code. Then the capacitance component is electrically equivalent to a capacitor (electric condenser) having a capacitance corresponding to the digital control code. When this control code changes, its change causes a switching operation within the capacitive component, so that the capacitance value itself changes in response to the change in the control code. [0003] figure 1 It is the layout diagram of the digital control var...

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Problems solved by technology

Therefore, the integration level of the variable capacitance module cannot be increased beyond the limit value

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