Received signal strength indicator with digital output and low power consumption functions

Abstract

The invention discloses a received signal strength indicator with digital output and low power consumption functions. The indicator is suitable for in-phase / quadrature (I / Q) four-way output circuit system and is characterized in that a four-way-to-two-way amplifier is arranged on an input side, a part of an output two-way signal directly accesses to a quantizer, the other part of the output two-way signal accesses to the other quantizer through the other amplitude amplifier, and outputs of the two quantizers access to a logical combiner together to form a four-bit digital signal output; and each quantizer comprises a double-input and double-output differentiator, five comparators and load capacitance charge-discharge circuits connected with the comparators respectively, and an ungrounded terminal of each load capacitance forms the outputs of the quantizers. With the application of the design scheme of the invention, the electricity framework of the received signal strength indicator (RSSI) is greatly simplified, the area occupied by a chip is reduced, simultaneously the energy consumption and cost required by achieving functions are reduced, and further the technical guarantee is provided for the application design of the I / Q four-way output circuit system.

Description

technical field [0001] The invention relates to a chip-level circuit design, in particular to a low-power consumption digital output circuit for receiving signal strength indication, aiming at reducing power consumption and cost of integrated circuits. Background technique [0002] With the rapid development of the electronic information industry, among many terminals at the radio frequency receiving end, in order to indicate the received signal strength, the user has a clear understanding of the use environment. Therefore, the signal receiving strength indicating device (hereinafter referred to as RSSI) is widely used in the circuit chip manufacturing process of the device. [0003] RSSI usually solves two problems: one indicates the signal strength received by the receiver (such as the signal strength display in the mobile phone and the connection status display during wireless Internet access), and can quantitatively express the received signal strength. Both detect sign...

AI Technical Summary

Problems solved by technology

[0005] Although the above architecture has the advantages of relatively high precision and relatively large detection range, it also has major disadvantages such as a complex system, not suitable for I / Q four-way output systems, more operational amplifiers, and relatively large power consumption.

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