发明名称 |
Amplifier circuit with reduced DC power related transients |
摘要 |
An amplifier circuit with improved turn-on transient operation includes a differential amplifier and a selectively variable reference generator for controlling the amplifier output during circuit turn-on. The amplifier is biased by a single power supply and its differential inputs are driven by a reference voltage from the reference generator and a single-ended input signal. Following circuit turn-on, the selectively variable reference voltage, generated by charging the bypass capacitor with a constant current source, charges in a linear manner from ground potential toward its final value of, typically, half of the power supply voltage. This allows improved turn-on transient operation to be realized, e.g. reduced "pops" and "clicks" upon circuit turn-on, while giving the user increased flexibility in selecting the sizes of the reference voltage bypass capacitor and the input signal coupling capacitor.
|
申请公布号 |
US5703529(A) |
申请公布日期 |
1997.12.30 |
申请号 |
US19960609726 |
申请日期 |
1996.03.01 |
申请人 |
NATIONAL SEMICONDUCTOR CORPORATION |
发明人 |
GHAFFARIPOUR, PARVIZ;KALB, ARTHUR J.;JOHNSON, NICK M.;TING, SAI L. |
分类号 |
H03F1/26;H03F1/30;H03F3/30;(IPC1-7):H03F1/26 |
主分类号 |
H03F1/26 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|