| 摘要 |
PURPOSE: A circuit for supplying voltage to telephone subscriber loop is provided to reduce the number of discrete elements, thereby assuring low power consumption. CONSTITUTION: A circuit for supplying voltage to telephone subscriber loop comprises a supply voltage source, a first circuit(1) and a second circuit(2). The supply voltage source comprises first and second terminals(Vh,Vbat), between which supply voltage(Vh - Vbat) is applied. The first circuit(1) is connected to a first line(a) and comprises first and second distribution voltage terminals. The second circuit(2) is connected to a second line(b) and comprises third and forth distribution voltage terminals. |
