公开(公告)号：EP0417634A3

公开(公告)日：1992-12-02

申请号：EP90117102.5

申请日：1990-09-05

申请人： Siemens Elema AB ,  SIEMENS AKTIENGESELLSCHAFT

发明人： Silvian, Sergiu

IPC分类号： A61N1/372 ,  H04L27/04

CPC分类号： A61N1/37211 ,  G01D5/243

摘要： An adjustable output level transmitter (10) includes a direct current energy source, an L-C tank circuit and a switching means for sequentially coupling the capacitors of the tank circuit to the direct current energy source and ground. The output signal frequency is equal to the resonant frequency of the L-C tank circuit and the output signal level is a function of which capacitors of the L-C tank circuit are sequentially coupled to the energy source. The circuit functions in a Class D mode with the inherent advantages of minimal power loss and very high efficiency. Due to the manner of switching utilized, the output signal frequency is very stable and unaffected by the mode of capacitor switching.

公开(公告)号：EP0412426B1

公开(公告)日：1993-08-04

申请号：EP90114784.3

申请日：1990-08-01

申请人： Siemens-Elema AB ,  SIEMENS AKTIENGESELLSCHAFT

发明人： Silvian, Sergiu

IPC分类号： H03B11/04 ,  H03L7/24

CPC分类号： H03B5/1221 ,  H03B5/1228 ,  H03B11/10 ,  H04B2001/0491

公开(公告)号：EP0412426A3

公开(公告)日：1991-09-18

申请号：EP90114784.3

申请日：1990-08-01

申请人： Siemens Elema AB ,  SIEMENS AKTIENGESELLSCHAFT

发明人： Silvian, Sergiu

IPC分类号： H03B11/04 ,  H03L7/24

CPC分类号： H03B5/1221 ,  H03B5/1228 ,  H03B11/10 ,  H04B2001/0491

摘要： A self-oscillating burst mode transmitter transmits an integral number of cycles of a carrier signal in each transmission burst. Each burst commences at a peak value of the carrier signal and terminates at a peak value. The transmitter includes an L-C tank circuit comprising a transmitting coil (L1) connected to a capacitor (C4). The L-C tank circuit is selectively energized through a switching network (Q1, Q2, U1, U2) connected to a power source, causing the tank circuit to resonate at a prescribed frequency (f₀). Selective energization of the tank circuit is achieved by the switching network as controlled by a peak voltage detection circuit (32, 34). The peak detection circuit senses when a peak voltage is present in the oscillatory waveform appearing across the coil of the resonating tank circuit. Power is switched off to the tank circuit at the conclusion of each transmission burst only when the oscillatory voltage waveform, as sensed by the peak detection circuit, is at a peak. This peak voltage is stored by the capacitor of the tank circuit during the time the power source is not connected to the tank circuit. At the beginning of the next transmission burst, when power is again coupled to the tank circuit through the switching network, the voltage initially appearing across the coil, and hence the voltage at the commencement of the next oscillatory waveform of the transmission burst, begins at the peak voltage value stored on the capacitor.

公开(公告)号：EP0417634A2

公开(公告)日：1991-03-20

申请号：EP90117102.5

申请日：1990-09-05

申请人： Siemens Elema AB ,  SIEMENS AKTIENGESELLSCHAFT

发明人： Silvian, Sergiu

IPC分类号： A61N1/372 ,  H04L27/04

CPC分类号： A61N1/37211 ,  G01D5/243

摘要： An adjustable output level transmitter (10) includes a direct current energy source, an L-C tank circuit and a switching means for sequentially coupling the capacitors of the tank circuit to the direct current energy source and ground. The output signal frequency is equal to the resonant frequency of the L-C tank circuit and the output signal level is a function of which capacitors of the L-C tank circuit are sequentially coupled to the energy source. The circuit functions in a Class D mode with the inherent advantages of minimal power loss and very high efficiency. Due to the manner of switching utilized, the output signal frequency is very stable and unaffected by the mode of capacitor switching.

摘要翻译： 可调输出电平变送器包括直流能量源，L-C槽电路和用于将储能电路的电容器顺序耦合到直流能量源和接地的开关装置。 输出信号频率等于L-C电路的谐振频率，输出信号电平是L-C电容电容器依次耦合到能量源的功能。 该电路具有D类模式的功能，具有最小的功率损耗和非常高的效率的固有优点。 由于使用的开关方式，输出信号频率非常稳定，不受电容器切换模式的影响。

公开(公告)号：EP0412426A2

公开(公告)日：1991-02-13

申请号：EP90114784.3

申请日：1990-08-01

申请人： Siemens Elema AB ,  SIEMENS AKTIENGESELLSCHAFT

发明人： Silvian, Sergiu

IPC分类号： H03B11/04 ,  H03L7/24

CPC分类号： H03B5/1221 ,  H03B5/1228 ,  H03B11/10 ,  H04B2001/0491

摘要： A self-oscillating burst mode transmitter transmits an integral number of cycles of a carrier signal in each transmission burst. Each burst commences at a peak value of the carrier signal and terminates at a peak value. The transmitter includes an L-C tank circuit comprising a transmitting coil (L1) connected to a capacitor (C4). The L-C tank circuit is selectively energized through a switching network (Q1, Q2, U1, U2) connected to a power source, causing the tank circuit to resonate at a prescribed frequency (f₀). Selective energization of the tank circuit is achieved by the switching network as controlled by a peak voltage detection circuit (32, 34). The peak detection circuit senses when a peak voltage is present in the oscillatory waveform appearing across the coil of the resonating tank circuit. Power is switched off to the tank circuit at the conclusion of each transmission burst only when the oscillatory voltage waveform, as sensed by the peak detection circuit, is at a peak. This peak voltage is stored by the capacitor of the tank circuit during the time the power source is not connected to the tank circuit. At the beginning of the next transmission burst, when power is again coupled to the tank circuit through the switching network, the voltage initially appearing across the coil, and hence the voltage at the commencement of the next oscillatory waveform of the transmission burst, begins at the peak voltage value stored on the capacitor.

摘要翻译： 自振荡突发模式发射机在每个传输突发中发送载波信号的整数个周期。 每个脉冲串以载波信号的峰值开始，并以峰值结束。 发射机包括L-C电路，包括连接到电容器（C4）的发射线圈（L1）。 L-C电路通过连接到电源的开关网络（Q1，Q2，U1，U2）选择性地通电，使得电路以规定的频率（f0）谐振。 通过由峰值电压检测电路（32,34）控制的开关网络来实现储能电路的选择性通电。 峰值检测电路检测在谐振电路的线圈上出现的振荡波形中是否存在峰值电压。 在峰值检测电路检测到的振荡电压波形处于峰值时，每个传输脉冲串的结束时，电源被切断到电路。 在电源没有连接到储能电路的时间期间，这个峰值电压由储能电路的电容器存储。 在下一个传输脉冲串的开始，当电源再次通过开关网络耦合到储能电路时，最初出现在线圈上的电压，因此在传输脉冲串的下一个振荡波形开始时的电压从 存储在电容器上的峰值电压值。