公开(公告)号：US20090027145A1

公开(公告)日：2009-01-29

申请号：US12162162

申请日：2007-01-22

Applicant: Kui Yong Lim ,  Joe Kok Keen Leong

Inventor： Kui Yong Lim ,  Joe Kok Keen Leong

IPC: H03J7/08

CPC classification number: H03J1/0083

Abstract: A receiver comprises two tuners and a DC-to-DC converter (DCC) for generating an increased supply voltage (VH) on the basis of a main supply voltage. Each tuner comprises a tunable circuit (TUC1), which can be tuned by means of a tuning voltage (VT1). Each tuner further comprises a tuning control circuit (TCC1) that is coupled to the DC-to-DC converter (DCC) via a load circuit (LD1) for generating the tuning voltage (VT1). The load circuit (LD1) of at least one of the two tuners comprises a branch (D1) coupled to receive the main supply voltage (VCC). The branch (D1) is conductive when the tuning voltage (VT1) is within a voltage range substantially comprised between 0 and the main supply voltage (VCC).

Abstract translation: 接收机包括两个调谐器和用于基于主电源电压产生增加的电源电压（VH）的DC-DC转换器（DCC）。 每个调谐器包括可调谐电路（TUC1），其可通过调谐电压（VT1）进行调谐。 每个调谐器还包括经由用于产生调谐电压（VT1）的负载电路（LD1）耦合到DC-DC转换器（DCC）的调谐控制电路（TCC1）。 两个调谐器中的至少一个的负载电路（LD1）包括耦合以接收主电源电压（VCC）的分支（D1）。 当调谐电压（VT1）在基本上在0和主电源电压（VCC）之间的电压范围内时，分支（D1）是导通的。

公开(公告)号：US07301584B2

公开(公告)日：2007-11-27

申请号：US10523382

申请日：2003-07-25

Applicant: Alan Chin Leong Yeo ,  Kui Yong Lim

Inventor： Alan Chin Leong Yeo ,  Kui Yong Lim

IPC: H04N5/46

CPC classification number: H03B5/1268 ,  H03B5/1206 ,  H03B5/1243 ,  H03B2201/025

Abstract: In a local oscillator for a tuning arrangement for both TV and FM signals there is substantial risk of parasitic oscillation. A special provision is disclosed for effectively reducing this risk. The special provision is a connection of a damping resistor (R1a) for suppressing parsitic oscillations between ground and a junction (J2) of a parallel LC resonator of the local oscillator.

Abstract translation: 在用于TV和FM信号的调谐装置的本地振荡器中，存在寄生振荡的巨大风险。 披露了一项特别规定来有效降低风险。 特别规定是用于抑制本地振荡器的并联LC谐振器的接地和结（J 2）之间的斜体振荡的阻尼电阻器（R1a）的连接。