专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20080247490A1 Receiver For Amplitude-Modulated Signals 有权
标题翻译：接收机用于幅度调制信号
公开(公告)号：US20080247490A1
公开(公告)日：2008-10-09
申请号：US11996299
申请日：2006-07-26
申请人： Rob Fortuin , Hubertus J. F. Maas
发明人： Rob Fortuin , Hubertus J. F. Maas
IPC分类号： H03D1/24 , H04L7/00
CPC分类号： H03D1/2245 , H04B1/30
摘要： In a receiver, a synchronization circuit (MIX2, OSC, C1, R1) provides a set of oscillator signals (OSI, OSQ) that are synchronized with a carrier of an amplitude-modulated signal. The set of oscillator signals (OSI, OSQ) comprises a quadrature oscillator signal (OSQ), which is substantially 90° phase shifted with respect to the carrier of the amplitude-modulated signal. A quadrature mixer (MIX2) mixes the quadrature oscillator signal (OSQ) with the amplitude-modulated signal so as to obtain a quadrature mixer output signal (MO2a). A phase-error corrector (PEC) adjusts the phase of the oscillator signals in response to a variation in the magnitude of an alternating current component (AC) in the quadrature mixer output signal (MO2a).
摘要翻译：在接收机中，同步电路（MIX 2，OSC，C 1，R 1）提供与幅度调制信号的载波同步的一组振荡器信号（OSI，OSQ）。振荡器信号（OSI，OSQ）的集合包括正交振荡器信号（OSQ），其相对于幅度调制信号的载波基本上相移90°。正交混频器（MIX2）将正交振荡器信号（OSQ）与幅度调制信号混合，以获得正交混频器输出信号（MO2a）。相位误差校正器（PEC）响应于正交混频器输出信号（MO2a）中的交流分量（AC）的幅度的变化来调节振荡器信号的相位。

2. 发明授权

US08189117B2 Receiver for amplitude-modulated signals 有权
标题翻译：接收机用于幅度调制信号
公开(公告)号：US08189117B2
公开(公告)日：2012-05-29
申请号：US11996299
申请日：2006-07-26
申请人： Rob Fortuin , Hubertus J. F. Maas
发明人： Rob Fortuin , Hubertus J. F. Maas
IPC分类号： H04N5/455
CPC分类号： H03D1/2245 , H04B1/30
摘要： In a receiver, a synchronization circuit (MIX2, OSC, C1, R1) provides a set of oscillator signals (OSI, OSQ) that are synchronized with a carrier of an amplitude-modulated signal. The set of oscillator signals (OSI, OSQ) comprises a quadrature oscillator signal (OSQ), which is substantially 90° phase shifted with respect to the carrier of the amplitude-modulated signal. A quadrature mixer (MIX2) mixes the quadrature oscillator signal (OSQ) with the amplitude-modulated signal so as to obtain a quadrature mixer output signal (MO2a). A phase-error corrector (PEC) adjusts the phase of the oscillator signals in response to a variation in the magnitude of an alternating current component (AC) in the quadrature mixer output signal (MO2a).
摘要翻译：在接收机中，同步电路（MIX2，OSC，C1，R1）提供与幅度调制信号的载波同步的一组振荡器信号（OSI，OSQ）。振荡器信号（OSI，OSQ）的集合包括正交振荡器信号（OSQ），其相对于幅度调制信号的载波相移大致为90°。正交混频器（MIX2）将正交振荡器信号（OSQ）与幅度调制信号混合，以获得正交混频器输出信号（MO2a）。相位误差校正器（PEC）响应于正交混频器输出信号（MO2a）中的交流分量（AC）的幅度的变化来调节振荡器信号的相位。

3. 发明授权

US5272534A Television receiver with automatic tuning control 失效
标题翻译：电视接收机具有自动调谐控制
公开(公告)号：US5272534A
公开(公告)日：1993-12-21
申请号：US878656
申请日：1992-05-05
申请人： Johannes S. Vromans , Hubertus J. F. Maas , Johannes Dollee
发明人： Johannes S. Vromans , Hubertus J. F. Maas , Johannes Dollee
IPC分类号： H04N5/44 , H03J1/00 , H03L7/087 , H04N5/455 , H04N5/50
CPC分类号： H03L7/087 , H03J1/0008 , H04N5/455 , H04N5/50
摘要： TV receiver including an RF section, a mixer stage to which a tuning frequency is applied from a tuning oscillator, an IF section, a synchronous detection device and a frequency and phase-locked loop circuit having a PLL and a FLL, the IF section being coupled to a phase detector of the PLL and to a frequency detection device of the FLL, the phase detector and frequency detection device being commonly coupled to a loop branch having the two loops in common and incorporating a loop filter and a controllable oscillator, the controllable oscillator applying a local in-phase carrier to the synchronous detection device and a local phase quadrature carrier to the phase detector. To improve the tuning behavior, an output of the loop filter is coupled to a circuit for generating a tuning control signal, this circuit including a comparison circuit for deriving a tuning control signal for the tuning oscillator from the difference between the value of the control signal of the controllable oscillator and a reference value, the controllable oscillator supplying an oscillator frequency which is equal to the intermediate frequency in the case of a control signal of the reference value.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式