IC chip type hearing aid module for mobile communication terminal
View Patent ↗Disclosed is an IC chip type hearing aid module for use in a mobile communication terminal having a hearing aid circuit including: a first section having a resistor R 1 and an inductor L 1 which are connected in series on a first output line Receiver_P between the mobile communication terminal and an ear speaker; a second section having a resistor R 4 and an inductor L 2 which are connected in series on a second output line Receiver_N between the mobile communication terminal and the ear speaker; a third section having a resistor R 2 and a capacitor C 2 which are connected in series between an input terminal of the first section and an output terminal of the second section; and a fourth section having a resistor R 3 and a capacitor C 3 which are connected in series between an input terminal of the second section and an output terminal of the first section.
1. An IC (integrated circuit) chip type hearing aid module having a hearing aid circuit, comprising:
a first section to increase a magnetic intensity produced in an ear speaker, and connected in series on a first output line between a mobile communication terminal and the ear speaker;
a second section to increase a magnetic intensity produced in the ear speaker, and connected in series on a second output line between the mobile communication terminal and the ear speaker;
a third section to compensate a tolerance generated by mutual interference between the second section and the first section, and connected in series between an input terminal of the first section and an output terminal of the second section; and
a fourth section to compensate a tolerance generated by mutual interference between the second section and the first section, and connected in series between an input terminal of the second section and an output terminal of the first section.
2. The IC chip type hearing aid module of claim 1 , wherein the third section and the fourth section transmit an AC audio signal while blocking a DC signal.
3. The IC chip type hearing aid module of claim 1 , wherein the hearing aid circuit further comprises a filter which is connected between the output terminals and/or the input terminals of the first and second sections.
4. The IC chip type hearing aid module of claim 1 , further comprising noise removing sections which are connected to the output terminals or input terminals of the first and second sections.
5. The IC chip type hearing aid module of claim 1 , further comprising a gain adjusting section which is connected to the input terminals of both the first and second sections and outputs a signal amplified through an induction loop amplification operation according to the gain setting from a user.
6. The IC chip type hearing aid module of claim 5 , wherein the gain adjusting section comprises:
a plurality of switches for gain setting;
two amplifiers each having two input terminals and an output terminal, the output terminals being connected to the input terminals of the first and second sections, a non-inverting one of the input terminals of one of the amplifiers and an inverting one of the input terminals of the other amplifier being connected to a ground terminal, and the switches being connected in parallel between the remaining input terminals of the amplifiers and the output terminals of the amplifiers; and
a plurality of resistors which are connected between the switches and the output terminals of the two amplifiers.
7. The IC chip type hearing aid module of claim 6 , wherein the gain adjusting section further comprises impedance adjusting sections, each of which comprises a capacitor and a resistor connected in series and which are respectively connected to the input terminals of the two amplifiers which have different polarities from each other.
8. The IC chip type hearing aid module of claim 1 , further comprising switches which are respectively connected to the output terminals of both the first and second sections to connect/disconnect between the hearing aid circuit and the ear speaker.
9. An electric device equipped with the IC chip type hearing aid module of claim 1 .