公开(公告)号：US06246725B1

公开(公告)日：2001-06-12

申请号：US09087708

申请日：1998-06-01

申请人： Etienne Vanzieleghem ,  Frank Cyriel Michel Defoort ,  Peter Paul Frans Reusens

发明人： Etienne Vanzieleghem ,  Frank Cyriel Michel Defoort ,  Peter Paul Frans Reusens

IPC分类号： H04L2704

CPC分类号： H04L27/2602 ,  H04L27/2626 ,  H04L27/2657

摘要： A telecommunication transmitter (TU) for a multi-carrier transmission system of the Digital Subscriber Line [DSL] type and which includes a coding circuit (MMC) able to generate “symbols” derived from carriers (Cl-Cn) modulated by incoming data, and a line driver circuit (LDC) to amplify these symbols. When idle data are received, the power dissipated in the transmitter is reduced because the symbols are then merely derived from a few or even a single carrier (the “pilot tone”) instead as from all the available carriers. The power dissipated is even more reduced because the line driver circuit is formed by a parallel connection of a high voltage but low efficiency (LL) and a lower voltage but higher performance (LH) line amplifier. The higher performance, and thus less power consuming, amplifier (LH) is used when idle data are received at the input (IN). In a variant, there is only one line amplifier of which the quiescent current is controlled as a function of the data traffic. In another variant, the number of carriers used by the coding circuit (MMC) is a function of the mean traffic of effective data received.

摘要翻译： 一种用于数字用户线路（DSL）类型的多载波传输系统的电信发射机（TU），其包括能够生成由输入数据调制的载波（C1-Cn）导出的“符号”的编码电路（MMC） 以及用于放大这些符号的线路驱动电路（LDC）。 当接收到空闲数据时，发射机消耗的功率减小，因为这些符号然后仅仅从几个甚至单个载波（“导频音”）导出，而不是从所有可用载波中导出。 由于线路驱动器电路由高电压但低效率（LL）和较低电压但较高性能（LH）线路放大器的并联连接形成，因此功率消耗更加降低。 当在输入（IN）处接收到空闲数据时，使用放大器（LH）的更高的性能，因此更少的功耗。 在一个变型中，只有一个线性放大器作为数据业务的函数来控制静态电流。 在另一个变型中，由编码电路（MMC）使用的载波的数量是所接收的有效数据的平均业务量的函数。