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    • 6. 发明申请
    • OUTPUT STAGE FOR A DIGITAL RF TRANSMITTER, METHOD FOR PROVIDING AN RF OUTPUT SIGNAL IN A DIGITAL RF TRANSMITTER, AND DIGITAL RF TRANSMITTER
    • 用于数字RF发射机的输出级,用于在数字RF发射机中提供RF输出信号的方法和数字RF发射机
    • WO2009113000A2
    • 2009-09-17
    • PCT/IB2009050960
    • 2009-03-09
    • NXP BVHE XINCOLLADOS ASENSIO MANELPAVLOVIC NENADVAN SINDEREN JAN
    • HE XINCOLLADOS ASENSIO MANELPAVLOVIC NENADVAN SINDEREN JAN
    • H04B1/04
    • H04B1/0483
    • An output stage (1) for a digital RF transmitter is provided. The output stage comprises: an input adapted to receive an input signal (RFin, b7-b0) to be transmitted; a plurality N of power amplification sections (S1, S2, S3, S4); and an output (A, B) providing an output voltage signal. Each of the N power amplification sections (S1, S2, S3, S4) is arranged to receive the input signal (RFin, b7-b0) and comprises a transformer (T1, T2, T3, T4) adapted to provide a respective output signal. Each transformer comprises a primary stage and a secondary stage; the secondary stages of the transformers (T1, T2, T3, T4) of the N power amplification sections (S1, S2, S3, S4) are combined such that a combined output voltage signal of the output stage is provided. The N power amplification sections (S1, S2, S3, S4) are adapted such that the input signal (RFin, b7-b0) is latched by clock signals (clock1, clock2, clock3, clock4) comprising different phases.
    • 提供了一种用于数字RF发射器的输出级(1)。 输出级包括:适于接收要发送的输入信号(RFin,b7-b0)的输入; 多个N个功率放大部分(S1,S2,S3,S4); 以及提供输出电压信号的输出(A,B)。 N个功率放大部分(S1,S2,S3,S4)中的每一个被布置成接收输入信号(RFin,b7-b0),并且包括适于提供相应输出信号的变压器(T1,T2,T3,T4) 。 每个变压器包括初级和次级级; N个功率放大部(S1,S2,S3,S4)的变压器(T1,T2,T3,T4)的次级组合,从而提供输出级的组合输出电压信号。 N个功率放大部分(S1,S2,S3,S4)被适配成使得输入信号(RFin,b7-b0)被包括不同相位的时钟信号(clock1,clock2,clock3,clock4)锁存。
    • 10. 发明申请
    • AGC CIRCUIT
    • AGC电路
    • WO0205423A2
    • 2002-01-17
    • PCT/EP0107401
    • 2001-06-28
    • KONINKL PHILIPS ELECTRONICS NV
    • VAN SINDEREN JAN
    • H03G3/20H03G3/00H03G3/30H04B1/16
    • H03G3/001H03G3/3036
    • AGC circuit comprising a digitally controlled amplifier being provided with a gain control loop including a level detector, a threshold circuit and a digital gain control signal generator being coupled to a gain control input of the digitally controlled amplifier for supplying thereto a digital gain control signal. To prevent astable gain settings of the digitally controlled amplifier from occurring a continuously controlled amplifier is being coupled between an output of the digitally controlled amplifier and the level detector, an output of the level detector being coupled to a gain control input of the continuously controlled amplifier for supplying thereto an continuous gain control signal, the gain variation range of the continuously controlled amplifier at least corresponding to the gain step variation of the digitally controlled amplifier at an incremental step of said digital gain control signal.
    • 包括数字控制放大器的AGC电路配备有包括电平检测器,阈值电路和数字增益控制信号发生器的增益控制环路,该数字增益控制信号发生器连接到数字控制放大器的增益控制输入端,用于向其提供数字增益控制信号。 为了防止数字控制放大器发生不稳定的增益设置,连续控制的放大器连接在数字控制放大器的输出端和电平检测器之间,电平检测器的输出端连接到连续控制的放大器的增益控制输入端 用于向其提供连续增益控制信号,所述连续控制放大器的增益变化范围至少对应于所述数字增益控制信号的增量步长处的数字控制放大器的增益阶跃变化。