automatic gain control circuit

Tài liệu Giáo trình kỹ thuật điện: Mạch tự động điều chỉnh độ lợi AGC AUTOMATIC GAIN CONTROL pptx

Tài liệu Giáo trình kỹ thuật điện: Mạch tự động điều chỉnh độ lợi AGC AUTOMATIC GAIN CONTROL pptx

... và (R - Y) như sau: Giáo trình kỹ thuật điện Mạch tự động điều chỉnh độ lợi AGC AUTOMATIC GAIN CONTROL Ta dùng 2 Transistor T 1 và T 2 dẫn điện ở 2 thời ... cực yếu và đổi lại khi C yếu thì AGC cho phép phân cực mạnh. Với màu AGC có tên là ACC (Automatic Color Control) . hình Khi qua nhiều mạch, sóng tải phụ đổi pha nên sắc của màu bị sai, ta sửa ... giống như trường hợp hệ NTSC 3. Việc thứ ba: xử lý triệt sai pha cho sóng màu: (PHASE CONPENSATOR CIRCUIT) Mạch gồm 3 mạch gọi là bổ chính 3 D hình Delayline của hàng (n + 1) là hàng n Delay...

Ngày tải lên: 15/12/2013, 16:15

33 1.8K 16
Power converter control circuits for two mass vibratory conveying system with electromagnetic drive simulations and experimental results IEEE trans

Power converter control circuits for two mass vibratory conveying system with electromagnetic drive simulations and experimental results IEEE trans

... with electromagnetic drive and power converter control circuits for its optimal control DESPOTOVIC ´ AND STOJILJKOVIC ´ : POWER CONVERTER CONTROL CIRCUITS FOR TWO-MASS VCS 459 Fig. 11. Amplitude ... and transient regimes with varying conveying mass is described. A. Phase Control Simulation circuit with phase angle control of the EVA coil is given in Fig. 8. The load mass, which is oscillating, ... power transistor drive circuit. Sine half-wave current reference value is obtained by precise rectification of signal difference from the voltage controlled os- cillator and controller output. This...

Ngày tải lên: 03/01/2014, 19:16

14 600 0
Practical Troubleshooting of Electrical Equipment and Control Circuits pptx

Practical Troubleshooting of Electrical Equipment and Control Circuits pptx

... Electrical Equipment and Control Circuits Figure 2.8 Power and control circuit for an inverter drive Devices, symbols, and circuits 27 A few simple control circuits are shown in ... start/stop control of AC drives 166 6.11 Control wiring for VSDS 169 6.12 Commissioning VSDs 170 7 Troubleshooting control circuits 173 7.1 Basic control circuits 173 7.2 Ladder logic circuits ... 7.3 Two-wire control 178 7.4 Three-wire control – start/stop 179 7.5 Jog/inch circuits 180 7.6 Sequence start and stop 181 7.7 Automatic sequence starting 183 7.8 Reversing circuit 183 7.9...

Ngày tải lên: 07/03/2014, 08:20

248 541 2
Motor control sensor feedback circuits

Motor control sensor feedback circuits

... stable, reliable and cost-effective control system. Further details on motor control circuits and sensors are provided in several books, including “Motor Control Electronics” (10). In addition, ... Parekh, Rakesh, “AN889 - VF Control of 3- Phase Induction Motors using PIC16F7X7 Microcontrollers”, Microchip Technology Inc., 2003. 10. Valentine, Richard, editor, “Motor Control Elec- tronics Handbook”, ... high-side current monitor circuits. Table 2 provides a list of the recommended Microchip op amps that can be used in a high-side circuit. FIGURE 5: High-Side Resistive Current Measurement Circuit. TABLE...

Ngày tải lên: 03/01/2014, 18:55

18 457 0
Tài liệu AUTOMATIC MONITORING AND CONTROL OF COOLING WATER TREAMENT PRODUCTS docx

Tài liệu AUTOMATIC MONITORING AND CONTROL OF COOLING WATER TREAMENT PRODUCTS docx

... operated p than control limits for the entire period. From this data, it is clear that installation and operation of sensor control unit substantially improved chemical inhibitor control. Biological control ... sensitivity and measurement differentiation (or range) for an automatic control sensor. A controller, Model 2EZ, used as the control interface between the sensor and chemical feed pum sufficient ... along with development of an on-line UV florescent monitor/controller. This unique tracer and control method allows automatic monitoring and control of inhibitor dosage and is currently marketed...

Ngày tải lên: 16/01/2014, 22:20

8 423 0
Tài liệu Automatic control for Commercial_building pptx

Tài liệu Automatic control for Commercial_building pptx

... Electric Control Circuits Classified 99 Series 40 Control Circuits 100 Series 80 Control Circuits 102 Series 60 Two-Position Control Circuits 103 Series 60 Floating Control Circuits 106 Series 90 Control ... Control Circuits 107 Motor Control Circuits 114 ENGINEERING MANUAL of AUTOMATIC CONTROL ENGINEERING MANUAL OF AUTOMATIC CONTROL CONTROL FUNDAMENTALS 36 ENGINEERING MANUAL OF AUTOMATIC CONTROL CONTROL ... automatic control. ENGINEERING MANUAL OF AUTOMATIC CONTROL CONTROL FUNDAMENTALS 17 Fig. 20. Comparison of Analog and Digital Control Signals. CONTROL MODES Control systems use different control...

Ngày tải lên: 24/01/2014, 23:20

518 2.4K 0
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