Single-chip numerical control attenuator chip driven by single voltage and positive voltage

Abstract

The invention provides a single-chip numerical control attenuator chip driven by a single voltage and a positive voltage. A chip circuit comprises an attenuation module, a power supply protection module and a level conversion module, a power supply voltage is inputted into the input end of the power supply protection module, and the output end of the power supply protection module is connected with the input end of the attenuation module and the power supply input end of the level conversion module. A control voltage is inputted into the control input end of the level conversion module, and the control output end of the level conversion module is connected with the control input end of the attenuation module. A radio frequency signal is inputted into the attenuation module and is outputtedafter attenuation control. Compared with the traditional attenuator design, the attenuator provided by the invention realizes a positive voltage controlled attenuator by changing the structure of a traditional attenuation unit, at the same time, the single chip is integrated with a driver, so that the control ports are reduced, the attenuator controlled by the single voltage is realized, the chipcan be compatible with TTL / CMOS signals, and the integration degree of the single chip is improved.

Description

technical field [0001] The application belongs to the technical field of numerically controlled attenuators, and in particular relates to a single-chip numerically controlled attenuator chip driven by a single positive voltage. Background technique [0002] Numerical control attenuator is an important microwave control circuit, which is widely used in electronic equipment such as broadband communication, electronic countermeasure system, microwave radio communication, radar and space communication. It mainly plays the function of gain setting and control in the circuit. Microwave systems have had a huge impact. Therefore, it is of great application value and practical significance to study single-chip digitally controlled attenuator chips driven by single-voltage positive voltage. [0003] The switch control device of the attenuator mostly adopts GaAs pseudo-high electron mobility transistor (pHEMT) device, which has the characteristics of smaller conduction insertion loss,...

AI Technical Summary

Problems solved by technology

Therefore, it is very necessary to provide an attenuator chip with high integration, strong versatility, and single-voltage positive-voltage control for the problems of poor practicability, complex control, and low integration of traditional numerically controlled attenuators.

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