发明名称 |
Voltage convertor for telephone terminal equipment. |
摘要 |
<p>An apparatus for generating a constant dc output voltage from a dc input voltage having a varying magnitude comprising an inductor for storing an electrical charge and a semiconductor switch for controlling the application of the input voltage to the inductor. The apparatus further comprises an error amplifier which compares the output voltage to a reference voltage and generates an error signal voltage proportional to the difference between the two voltages. An analog voltage divider generates a control voltage proportional to the ratio of the error signal voltage to the input voltage. The control voltage is applied to a pulse width converter which controls the duty cycle of the semiconductor switch responsive to changes in the input voltage such that the output voltage remains constant.</p> |
申请公布号 |
EP0190110(A2) |
申请公布日期 |
1986.08.06 |
申请号 |
EP19860850013 |
申请日期 |
1986.01.20 |
申请人 |
TELEFONAKTIEBOLAGET L M ERICSSON |
发明人 |
JOHANSSON, JAN HJALMAR |
分类号 |
H02M3/156;(IPC1-7):H02M3/156 |
主分类号 |
H02M3/156 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|