Orthogonal input divide-by-2 frequency divider

Abstract

The invention is suitable for the field of frequency dividers, and provides an orthogonal input divide-by-2 frequency divider, which comprises: a filter circuit for inputting an external power supply and performing output after filtering; a tuning circuit connected with an output end of the filter circuit; a mixer stage connected to an output end OUTI, an output end OUTIB, an output end OUTQB and an output end OUTQ of the orthogonal input divide-by-2 frequency divider together with the output end of the filter circuit; a transconductance stage connected with an input end INI, an input end INIB, an input end INQ and an input end INQB of the orthogonal input divide-by-2 frequency divider respectively to input a voltage signal, convert the voltage signal into a current signal and output the current signal to a common source end of the mixer stage; and a current source biasing circuit connected to the common source end of the transconductance stage and enabling the transconductance stage to form a variable current source by injecting an external current source. According to the orthogonal input divide-by-2 frequency divider provided by the invention, the external current source is injected into the current source biasing circuit to enable the transconductance stage to form the variable current source so as to increase the current of the transconductance stage, so that the conversion grain, the degree of linearity and the range of a working frequency of the orthogonal input divide-by-2 frequency divider can be effectively improved.

Description

technical field [0001] The invention belongs to the field of frequency dividers, in particular to a quadrature input two frequency divider. Background technique [0002] Frequency dividers are widely used in the communication field, including quadrature input frequency dividers, phase shift based frequency dividers, etc. [0003] However, the disadvantage of the existing quadrature input frequency divider is that its operating frequency range is limited, and it cannot be well applied to devices with higher requirements on the operating frequency range. Contents of the invention [0004] The object of the present invention is to provide a quadrature input frequency divider by two, which aims to solve the disadvantage of the existing quadrature input frequency divider that its operating frequency range is limited, and it cannot be well suited for applications that require a higher operating frequency range. Device problem. [0005] The present invention is achieved like th...

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Problems solved by technology

[0004] The object of the present invention is to provide a quadrature input frequency divider by two, which aims to solve the disadvantage of the existing quadrature input frequency divider that its operating frequency range is limited, and it cannot be well suited for applications that require a higher operating frequency range. device problem

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