公开(公告)号：US5244070A

公开(公告)日：1993-09-14

申请号：US845635

申请日：1992-03-04

申请人： Ralph H. Carmen ,  James M. Rodgers

发明人： Ralph H. Carmen ,  James M. Rodgers

IPC分类号： G07D20060101 ,  G07D5/08 ,  G07F20060101

CPC分类号： G07D5/08

摘要： An apparatus for sensing coins is disclosed which is capable of distinguishing between valid and non-valid coins as well as between the different denominations of coins. The apparatus is useful for application in coin-operated parking meters as well as other coin-operated machines. The apparatus makes use of a twin-coil sensor which enables it to distinguish between small coins with high metal content and large coins with low metal content.

摘要翻译： 公开了用于感测硬币的装置，其能够区分有效硬币和非有效硬币以及硬币的不同面额。 该装置可用于投币式停车计费器以及其他投币式机器中。 该装置利用双线圈传感器，使其能够区分具有高金属含量的小硬币和具有低金属含量的大型硬币。

公开(公告)号：US5273151A

公开(公告)日：1993-12-28

申请号：US855252

申请日：1992-03-23

申请人： Ralph H. Carmen ,  James M. Rodgers

发明人： Ralph H. Carmen ,  James M. Rodgers

IPC分类号： G07D5/08 ,  H03K17/95

CPC分类号： H03K17/952 ,  G07D5/08

摘要： A coin detection apparatus is disclosed which is particularly suitable for low power applications. The coin detection apparatus utilizes a detector coil as part of a resonant circuit. The resonant circuit with no coin present in the detector coil has a damped impulse response. When a coin is present within the detector coil, the damping of the impulse response of the resonant circuit is increased. Periodic generation of an impulse input to the resonant circuit and measurement of the resulting impulse response enables the presence of a coin within the detector coil to be ascertained.

摘要翻译： 公开了一种特别适用于低功率应用的硬币检测装置。 硬币检测装置利用检测器线圈作为谐振电路的一部分。 检测器线圈中没有硬币的谐振电路具有阻尼的脉冲响应。 当检测器线圈内存在硬币时，谐振电路的脉冲响应的衰减增加。 对谐振电路的脉冲输入的周期性产生和所得到的脉冲响应的测量使得能够确定检测器线圈内的硬币的存在。

公开(公告)号：US5155614A

公开(公告)日：1992-10-13

申请号：US780422

申请日：1991-10-22

申请人： Ralph H. Carmen ,  James M. Rodgers

发明人： Ralph H. Carmen ,  James M. Rodgers

IPC分类号： H03F1/02 ,  H04B10/10

CPC分类号： H04B10/1141 ,  H03F1/0283 ,  H04B10/40

摘要： A low-power receiver for extracting a digital data signal from a modulated carrier signal is disclosed. The receiver employs an amplifier whose stages share the same bias current in order to reduce power consumption.

摘要翻译： 公开了一种用于从调制载波信号中提取数字数据信号的低功率接收机。 接收机采用放大器，其放大器共享相同的偏置电流，以降低功耗。