High dynamic range radio frequency signal power detection circuit

Abstract

The invention belongs to the technical field of integrated circuit design, in particular a radio frequency signal power detection circuit. The radio frequency signal power detection circuit comprises a rectifier, a gain-variable transimpedance amplifier, a level adjusting circuit, a high-precision comparator, a counter and automatic gain control circuit, an RC calibrating circuit and a clock generation and control circuit. The power detection circuit realizes the function of detecting the frequency signal power through voltage detection and programming adjustment and control of the dynamic range of the detection circuit according to the input signal power. In order to realize the high precision and high dynamic range, the RC charging and discharging circuit is provided with the special RC calibrating circuit. The clock generation circuit is used for controlling the comparator, the RC charging and discharging circuit, the RC calibrating circuit and the counter and automatic gain control circuit to work. With the RC charging and discharging circuit, the RC calibrating circuit and the automatic gain control circuit additionally arranged in the power detection circuit, the invention realizes the high dynamic range and high-precision logarithmic-to-linear power detection for the radio frequency signal.

Description

technical field [0001] The invention belongs to the technical field of integrated circuit design. In particular, it relates to a transceiver in a wireless communication system, a radio frequency signal power detection circuit with built-in self-detection and error correction for analog and radio frequency circuits. Background technique [0002] The radio frequency signal power detection circuit is one of the power detection circuits. It has a wide range of applications in wireless communication systems, design for testability of analog radio frequency circuits, and self-testing and error-correction. figure 1 The functions of the power detection circuit 10 in analog and radio frequency circuits are described. It is a bridge connecting the control module or indicating module 9 and the signal 11 in the signal path, it can detect the instant signal power of the required point in the signal path, and the electrical quantity representing the signal power obtained through its det...

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Problems solved by technology

It is easy to know that such a detection using the rectification characteristics of the tube often has a limited working range of effective accuracy, especially when the logarithm-linear relationship is to be realized, the sub-threshold working range is small, and the exponential approximation range is also very limited, making it difficult to achieve high dynamics Range high precision RF signal power detection

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