Electronic inductance circuit for the power supply of a 2-wire bus intercom system and a device thereof
The present invention discloses an electronic inductance circuit for the power supply of a 2-wire bus intercom system and a device thereof. The electronic inductance circuit comprises a main circuit path along an inductor and a source terminal and a drain terminal of a FET between the input terminal and the output terminal of said electronic inductance circuit, in which said inductor is connected to said source terminal of said FET; a resistor and a freewheeling diode individually connected to said inductor in parallel; and a secondary circuit path along a capacitor connected with a second resistor in series between said input terminal and said output terminal, which is connected to said main circuit path in parallel. The solutions of the present invention achieve larger direct current power supply for the 2-wire intercom system and stable alternating current impedance with fast response to the DC power supply.
1. An electronic inductance circuit for a power supply of a 2-wire bus intercom system, wherein said electronic inductance circuit comprises:
a main circuit path along an inductor and a source terminal and a drain terminal of a FET between an input terminal and an output terminal of said electronic inductance circuit, in which said inductor is connected to said source terminal of said FET;
a resistor and a freewheeling diode individually connected to said inductor in parallel; and
a secondary circuit path along a capacitor connected with a second resistor in series between said input terminal and said output terminal, which is connected to said main circuit path in parallel.
2. The electronic inductance circuit according to claim 1 , wherein said inductor and said FET are connected in series.
3. The electronic inductance circuit according to claim 1 , wherein said electronic inductance circuit further comprises: a second diode, connected to said source terminal and said drain terminal of said FET in parallel.
4. The electronic inductance circuit according to claim 1 , wherein a node between said capacitor and said second resistor is connected with a gate terminal of said FET.
5. The electronic inductance circuit according to claim 1 , wherein said FET is a P-channel FET.
6. The electronic inductance circuit according to claim 5 , wherein said drain terminal of said P-channel FET is connected to said output terminal.
7. The electronic inductance circuit according to claim 6 , wherein said inductor is connected between said input terminal and said source terminal of said P-channel FET.
8. The electronic inductance circuit according to claim 1 , wherein said FET is an N-channel FET.
9. The electronic inductance circuit according to claim 8 , wherein said source terminal of said N-channel FET is connected to said input terminal.
10. The electronic inductance circuit according to claim 9 , wherein said inductor is connected between said source terminal of said N-channel FET and said output terminal.