Method for increasing transmitting power of UHF wireless microphone with transmitter discrete component double power supplies

Abstract

The invention discloses a method for increasing the transmitting power of a UHF wireless microphone with transmitter discrete component double power supplies. Two independent power supplies formed bysubstantially same discrete components are used, one power supply increase 6.8V to 12V, when the power supply power to an RF power amplifier is increased to 80mW to 100mW from 20mW, whole machine current is increased from 150mA to 350mA, and generally, the minimum usage time of 1000mAH is 155 minutes. The other power supply supplies 5V power independently, two voltage regulator ICs which reduce voltage to 5V from 6.8V to 12V, stable power supply is supplied to a single-chip microcomputer, a display part and a PLL phase-locked loop VCO part, the noise generated by the power supply is reduced. Compared with a conventional microphone transmitter powered by a single supply, the noise is reduced, the audio quality is improved, the usage efficiency of the battery is improved, the cost of use isreduced, the transmission power is increased, the ultra-long-distance transmission is achieved, and the needs of a customer are satisfied.

Description

technical field [0001] The invention belongs to the technical field of ultra-long-distance transmission of wireless microphones, and more specifically relates to a method for increasing transmission power by supplying dual power supplies to discrete parts of a transmitter of a UHF wireless microphone. Background technique [0002] The wireless microphone is composed of several pocket transmitters (can be put in the pocket, the output power is about 0.01W) and a centralized receiver. Each pocket transmitter has a different working frequency. The centralized receiver can Simultaneously receive voice signals of different operating frequencies from each pocket transmitter. It is suitable for occasions such as a stage podium, and the existing wireless microphone is powered by a single power supply. [0003] However, when powered by a single power supply, the transmitter voltage is increased from 6.8V to 12V, and when the RF power is increased from 20mW to 80mW-100mW, the current...

AI Technical Summary

Problems solved by technology

[0003] However, when powered by a single power supply, the transmitter voltage is increased from 6.8V to 12V, and when the RF power is increased from 20mW to 80mW-100mW, the current is increased from 150mA to 550mA. Generally, the use time of 1000mAH is 35 minutes, and the battery efficiency is low. Hot; when the radio frequency transmission power increases, the increase in current reduces the power supply efficiency, the battery load is heavy, the battery life is short, and at the same time, the ripple (noise) amplitude generated by the power supply also increases

These problems occur at the same time as the ultra-long distance is realized, which affects the use effect and product quality of the product

Images