Patent ID: 8189815
Filing Date: 2012-05-29
Classification: H04R

Abstract:
1. A microphone circuit, comprising: a signal generating module transforming audio signals into electronic signals, the signal generating module including a first resistor, a second resistor, a capacitor, and a signal generator, the first resistor, the second resistor, and the capacitor connected in series, the signal generator having a first connector configured for transmitting a forward electronic signal, a second connector configured for transmitting a reverse electronic signal, and a third connector grounded or functioning as a gain control connector; a filtering module connected to the signal generating module to filter the electronic signals; a transmitting module connected to the filtering module to transmit the filtered electronic signals to a broadcaster; and a switch module connected to the signal generating module to allow both the forward electronic signal and the reverse electronic signal to be sent to the filtering module or only the forward electronic signal to be sent to the filtering module to selectively regulate the microphone circuit to function as a differential microphone circuit or a single-ended microphone circuit; the switch module including a first switch connected between the second connector and the first resistor, such that the first resistor and the second resistor are connected in series between the first switch and the capacitor.