CMOS up-conversion circuit with direct-current bias conversion structure
A technology of DC bias and frequency conversion circuit, which is applied in the field of electronic communication, can solve problems such as difficult coordination of intermediate frequency signals, and achieve the effect of preventing oscillation
Inactive Publication Date: 2015-02-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0010] In order to solve the problem that it is difficult to coordinate the front-end digital low-frequency signal bias and the intermediate frequency signal bias required by the up-converter mixing circuit in the existing transmitter structure, the present invention provides a CMOS on-board converter with a DC bias conversion structure Frequency conversion circuit
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[0045] Such as image 3 Shown is the first embodiment of the present invention, a CMOS up-conversion circuit with a DC bias conversion structure in this embodiment includes: a DC bias conversion circuit and an up-conversion circuit; the DC bias conversion circuit includes a first Transistor M1, second transistor M2, third transistor M3, fourth transistor M4, fifth transistor M5, sixth transistor M6, seventh transistor M7, eighth transistor M8, ninth transistor M9, tenth transistor M10, tenth A transistor M11, a twelfth transistor M12, a first capacitor C1, a second capacitor C2, and a first resistor R1, M1, M2, and M3 form a first current bias, M10, M11, and M12 form a second current bias, and M6 , M7 form a common source amplifier, M8, M9 form a source follower, M4, M5 form a signal output circuit; the up-conversion circuit includes a thirteenth transistor M13, a fourteenth transistor M14, a fifteenth transistor M15, and a sixteenth transistor M16, the seventeenth transistor...
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The invention discloses a CMOS up-conversion circuit with a direct-current bias conversion structure. A direct-current bias conversion circuit is arranged for a traditional up-conversion circuit. The direct-current bias conversion circuit comprises twelve MOS tubes, two capacitors, and a resistor. The first to third MOS tubes and the tenth to twelfth MOS tubes respectively provide current bias for the corresponding MOS tubes. The sixth and seventh MOS tubes form a common-source amplifier. The eighth and ninth MOS tubes form a source follower. The fourth and fifth MOS tubes form a signal output circuit, and the gates of the fourth and fifth MOS tubes are connected with the input end of the up-conversion circuit as the output end of the direct-current bias conversion circuit. Current conversion is carried out on low-frequency and medium-frequency signals through common-source amplification, and direct-current bias is shifted by a source following way. By adopting the scheme, the problem that bias between a traditional mixer and a front-end DAC is hard to coordinate is solved. In addition, the two capacitors in the circuit compensate the phase margin in order to prevent the occurrence of shock.
Description
technical field [0001] The invention belongs to the technical field of electronic communication, and in particular relates to a CMOS up-conversion circuit with a DC bias conversion structure. Background technique [0002] A Complementary Metal Oxide Semiconductor (CMOS) transistor is a voltage controlled current device. Due to its excellent characteristics such as high integration, low cost, and mature technology, it has become the primary technology choice for designing logic circuits and high-frequency analog circuits. And in recent years, due to the continuous improvement of the technology and the continuous reduction of the channel length, the working speed of the device has been continuously increased, and it can be widely used at a higher frequency. It is this excellent feature that makes it gain a very high market share in the transceiver system that requires more and more high integration. [0003] CMOS transistors can be divided into three types: cut-off region, l...
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IPC IPC(8): H03D7/16
Inventor 张铁笛王磊邹盼希徐锐敏
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA