ASK (Amplitude Shift Keying) modulator with self-calibration function

Abstract

The invention discloses an ASK (Amplitude Shift Keying) modulator with a self-calibration function. An ASK modulation circuit output end signal is used as an input end signal of an amplitude detection circuit; an output signal of the amplitude detection circuit is connected with the input end of a logic control circuit; under the action of a clock signal CLK (clock), the logic control circuit generates multi-bit output; the output signal serves as gain control signal to regulate the gain of an ASK modulation circuit; the amplitude detection circuit and the logic control circuit form a self-calibration feedback loop; a self-calibration trigger signal is simultaneously used as an input control signal for the amplitude detection circuit and the logic control circuit and can be used for triggering a circuit to work by a rising edge signal; the logic control circuit outputs a self-calibration end mark signal after the self-calibration operation is finished; the self-calibration end mark signal serves as a control signal for the amplitude detection circuit and the logic control circuit; the circuit is shut down to eliminate the influence by factors, such as temperature drift, process variation and the like; and the signals output after modulation have the advantages of stability and consistency.

Description

technical field [0001] The invention relates to the technical field of wireless communication and the field of integrated circuit design, in particular to an ASK modulator with a self-calibration function. Background technique [0002] With the rapid development of the personal consumer mobile terminal market, wireless communication technology has been widely used. In order to transmit information reliably and effectively, the original data needs to be modulated. In wireless communication technology, ASK is a simple and widely used modulation method for the transmission of digital signals. ASK modulators are commonly used in transmitter and transceiver chips. application. ASK modulation is the modulation of binary information onto the carrier amplitude, of which OOK is the simplest and most common form of ASK. [0003] In the transceiver or transmitter structure, the digital baseband processes the transmitted data, and performs amplitude keying modulation on the RF carrier...

AI Technical Summary

Problems solved by technology

The input carrier signal amplitude of the ASK modulator and the modulator's own gain are affected by factors such as temperature drift and process deviation. Therefore, the signal amplitude shows greater instability and poor consistency.

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