公开(公告)号：US08315587B2

公开(公告)日：2012-11-20

申请号：US12231184

申请日：2008-08-29

申请人： Shahram Tadayon ,  Wade Robert Gillham ,  Peter J. Vancorenland ,  Daniel Mark Thompson

发明人： Shahram Tadayon ,  Wade Robert Gillham ,  Peter J. Vancorenland ,  Daniel Mark Thompson

IPC分类号： H04H20/57

CPC分类号： H03J7/02 ,  H04B1/08

摘要： In one implementation, a receiver may have an analog front end with an amplifier to receive a radio frequency (RF) signal and a mixer to downconvert the signal to a baseband signal. Then, a demodulator may receive the baseband signal and obtain an audio signal therefrom. Still further, a controller may be coupled to receive a control signal corresponding to a variable impedance level, and control a local oscillator coupled to the mixer responsive to the control signal. The variable impedance may be controlled by a user to tune to the channel.

摘要翻译： 在一个实现中，接收机可以具有模拟前端，其具有放大器以接收射频（RF）信号和混频器以将信号下变频为基带信号。 然后，解调器可以接收基带信号并从其获得音频信号。 此外，控制器可以被耦合以接收对应于可变阻抗电平的控制信号，并且响应于控制信号来控制耦合到混频器的本地振荡器。 可变阻抗可以由用户控制以调谐到通道。