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電源設計應用
DAC and Op Amp Generate Variab
Abstract: This design idea describes a simple circuit to generate a programmable negative control voltage. It takes the output of a single supply digital-to-analog converter (DAC) and produces a variable negative voltage. The DAC output fr...
2009-05-07 標簽：Voltage 2303
Rail-to-Rail Outputs and Beyon
Abstract: When does the input voltage range of a low power/low voltage op amp become important? What operational amplifier should you choose when designing a battery powered handheld system? To optimize performance in tod...
2009-05-07 標簽：Micropower 2873
監(jiān)測一小步變化的直流電壓-Monitoring a Smal
Abstract: Simple level shifting circuit using a precision op amp tracks small DC voltage changes. When we want to capture a low level, long duration signal riding on a much higher DC level, we need to have adequate resolu...
2009-05-07 標簽：直流電壓 1295
審議“ Deboo ”單電源集成-Consider the
Abstract: The "Deboo" Integrator simplifies the use of single-supplies by ground-referencing both the input and the output. The design of standard inverting integrators is simple when bipolar supplies are available, but i...
2009-05-07 標簽：電源集成 877
Negative Resistor Cancels Op A
Abstract: Canceling the load allows the op amp the capability for high output current while maintaining all the other high-accuracy specifications such as very high open-loop gain, low offset voltage and current, low offset-voltage and off...
2009-05-07 標簽：Resistor 1394
交點分析運算放大器電路-Nodal Analysis of
Abstract: The creation of the op amp introduced a new fundamental component and marked a change in thinking for analog designers. Since it is so widely used, pretty much any op amp circuit that an engineer needs to implement has already be...
2009-05-07 標簽：放大器 795
三運放架構對儀表放大器的制約
摘要：一直以來，三運放儀表放大器作為工業(yè)標準被用于那些要求高增益和/或高CMRR的精密應用場合。然而，當此類放大器工作在當前絕大多數(shù)應用所要求的單電源供電系統(tǒng)時，存在...
2009-05-07 標簽：放大器 2035
帶有輸入串聯(lián)電阻的電流檢測放大器的性能
摘要：本篇應用筆記闡述了高邊電流檢測放大器的性能特性。本文論述了在放大器的檢測輸入端如何使用串聯(lián)電阻。該設計方法特別適用于需要對高壓線路上檢測電阻兩端的小信號...
Extend Current-Sense Amplifier
Abstract: Adding a charge pump provides ±5V supply rails to the operational amplifier internal to a high-side current-sense amplifier. This modification enables that amplifier to sense currents down to 0V common-mode inputs. The circuit c...
2009-05-07 標簽：AmplifierCurrent-Se 2553
采用簡單的穩(wěn)壓電路為高邊電流監(jiān)測器提供恒定電壓
摘要：在典型的光電二極管電流監(jiān)測應用中，電流監(jiān)測器和雪崩光電二極管(APD)之間的壓降隨溫度和電流而變化，由此改變了總增益。本應用筆記介紹了一種利用穩(wěn)壓電路保持電流檢...
利用精密儀表放大器實現(xiàn)負壓電流檢測
摘要：ISDN、電信等系統(tǒng)需要一個負壓電流檢測放大器。本應用筆記介紹了一種設計負壓電流檢測放大器的方法。這種方法非常靈活，經過簡單修改即可用于不同的負壓電流檢測。本...
特種氬弧焊機電源的實現(xiàn)
討論了一種用于氬弧焊機的電源系統(tǒng)。該系統(tǒng)解決了現(xiàn)有焊接電源存在的引弧困難、電流控制精度低等問題；電源隨工控機控制的給定焊接電流參數(shù)而變化，提高了設備的自動化程...
2009-05-06 標簽：電源 3529
Autozero Noise Filtering Impro
Abstract: This article shows a simple technique to reduce the output noise of an autozero, indirect current-feedback instrumentation amplifier. The MAX4209 instrumentation amplifier serves as design example. A similar art...
2009-05-06 標簽：Filtering 1208
High-Side Current-Sense Amplif
Abstract: This circuit modifies a standard 32V high-side current monitor to measure load current (to 30mA) while accommodating any level of high voltage, subject to limitations in the external components. (The components shown allow measur...
2009-05-06 標簽：Current-Se 2071
Overcurrent Monitor Operates u
Abstract: Using a current-sense amplifier, a high-side MOSFET driver, and a latching voltage monitor a circuit can be easily constructed that protects from overcurrent conditions and operates at voltages as high as 26V. W...
2009-05-06 標簽：Overcurren 1041
電流限制電路的降壓穩(wěn)壓器-Current-Limit Cir
Abstract: This article demonstrates how to achieve current limit for the MAX1692 PWM step-down regulator by using a MAX4173H current-sense amplifier. Additional Information: Quick View Data Sheet for the MAX16...
High-Accuracy Current-Sense Am
Abstract: Current sharing between DC/DC converter modules enables several modules to be paralleled. In recent years, tight tolerances for current sharing have made discrete current-sense circuit designs a formidable challenge. This applica...
2009-05-06 標簽：Current-Se 1535
高側電流傳感器輸出周期-High-Side Current
Abstract: The MAX4374 high-side current sense amplifier with two internal comparators is used to produce a pulse-width output signal proportional to the current being sensed. This simple circuit eliminates the need for a discrete A/D conve...
Practical Data Acquisition usi
Abstract: This application note describes the design of a PC-based, 14-bit data acquisition system. It takes a system approach, includes all the necessary building blocks: analog, digital, hardware, and software. It discusses each step, te...
2009-05-06 標簽：Power 1526
混合電路驅動器的類型和數(shù)量的LED-Circuit Driv
Portable systems often use LEDs of different colors-white for the display backlight, green for keypad illumination, red for power, etc., and in varying quantities of each. Typically the LEDs are driven by at least two power supplies, one f...
用兩個單向電流檢測放大器組成一個雙向電流檢測放大器
摘要：許多電池電流監(jiān)測應用中需要雙向電流檢測功能，以測量電池的充電和放電電流。本文介紹了怎樣用兩個單向電流檢測放大器，比如MAX4172和MAX4173，組成一個雙向電流檢測放大...
簡單的、輸出鎖定的過流故障檢測器，具有快速的響應時間
摘要：本文介紹了一個簡單、具有快速響應時間的過流故障檢測器，用于低壓系統(tǒng)的電路保護。該方案與專用的熱插拔控制器不同，專用的熱插拔控制器跳出欠壓狀態(tài)后往往具有較...
2009-05-06 標簽：檢測器 1284
帶有輸入串聯(lián)電阻的電流檢測放大器的性能
摘要：本篇應用筆記闡述了高邊電流檢測放大器的性能特性。本文論述了在放大器的檢測輸入端如何使用串聯(lián)電阻。該設計方法特別適用于需要對高壓線路上檢測電阻兩端的小信號...
2009-05-06 標簽：串聯(lián)電阻 1067
采用簡單的穩(wěn)壓電路為高邊電流監(jiān)測器提供恒定電壓
摘要：在典型的光電二極管電流監(jiān)測應用中，電流監(jiān)測器和雪崩光電二極管(APD)之間的壓降隨溫度和電流而變化，由此改變了總增益。本應用筆記介紹了一種利用穩(wěn)壓電路保持電流檢...
電路簡單雙打輸入頻率-Simple Circuit Doub
Abstract: A simple circuit consisting of a comparator and an exclusive-OR gate is sufficient to double the frequency of a reference signal. The versatile phase-locked loop (PLL) allows multiplication of a reference freque...
2009-05-06 標簽：頻率 1586
閱讀隔離數(shù)字國家的電力消耗-Read Isolated Di
Abstract: A simple circuit employs a small transformer and latched comparator to sense the state of a digital line without drawing power from the line. Electronic systems must often isolate their inputs or outputs from th...
2009-05-06 標簽：電力 784
pFET線性穩(wěn)壓低壓差-pFET Linear Regula
P-channel MOSFETs (pFETs), though more expensive than pnp transistors, are free of the dissipation loss associated with base drive in a pnp circuit. pFETs also have a lower saturation voltage at light loads (Figure 1). In fact, the low RDS...
2009-05-06 標簽：pFET 1712
升壓轉換器具有較高的輕負載效率-Boost Converte
In most DC-DC converters, the normal supply currents do not allow high efficiency at low load currents. The circuit in Figure 1, however, contains micropower components that enable it to maintain 90% efficiency for load currents as low as ...
2009-05-06 標簽：轉換器 1149
EPOT應用：偏移調整的運算放大器電路-EPOT Appli
Abstract: In some electronic systems, a DC offset voltage at the inputs will contribute a significant error to the output. This is especially true in high gain configurations. An offset adjustment circuit can be added to "null" out the off...
2009-05-06 標簽：放大器 1019
EPOT應用：增益調整的運算放大器電路-EPOT Appli
Variable gain amplifiers often use a mechanical potentiometer to set the gain. An example is a volume control dial. However, when the analog signal path is digitally controlled, a digital potentiometer might be used to control gain. This a...
2009-05-06 標簽：放大器 673
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