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npn Transistors
npn Transistors

... 800 in value depending on the type of transistor. It is therefore very important to check this value for any transistor you are going to use in any practical circuit. As far as examination questions are concerned, you would not be expected to remember the different values of hFE, you will either be ...
2.6.2 Npn Transistors Word Document | GCE AS/A
2.6.2 Npn Transistors Word Document | GCE AS/A

RClamp0504M
RClamp0504M

... that it is not uncommon for the VF of discrete diodes to exceed the damage threshold of the protected IC. This is due to the relatively small junction area of typical discrete components. It is also possible that the power dissipation capability of the discrete diode will be exceeded, thus destroyin ...
Constant Current Source and Temperature Sensor
Constant Current Source and Temperature Sensor

... If higher accuracy is required, a two point calibration technique can be used. In Figure 4, separate zero and slope trims are provided. Residual nonlinearity is now the limitation on accuracy. Nonlinearity of the LM134 in a 100°C span is typically less than 0.5°C. This particular method of trimming ...
PCA9306-Q1 Dual Bidirectional I2C Bus and SMBus Voltage
PCA9306-Q1 Dual Bidirectional I2C Bus and SMBus Voltage

Fig. 1.1. Block Diagram of a Brushless Motor Drive System
Fig. 1.1. Block Diagram of a Brushless Motor Drive System

Single Phase PV Inverter Applying a Dual Boost Technology
Single Phase PV Inverter Applying a Dual Boost Technology

... controlling analog circuits with a processor's digital outputs. It is a very useful technique and has wide applications in measurement and communications areas for power control and conversion. This technique is used to decrease the Total Harmonic Distortion (THD) of load current. The total harmonic ...
High Voltage Fuses
High Voltage Fuses

... It is comparatively free from oxidation. It does not deteriorate when used in dry air. High Conductivity ...
OPA860 数据资料 dataSheet 下载
OPA860 数据资料 dataSheet 下载

... OPA660 Upgrade ...
VISHAY TCLT1 datasheet
VISHAY TCLT1 datasheet

... information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed therein, which apply to these products. No license, express or implied, by e ...
AN-2094 LM3481 SEPIC Evaluation Board (Rev
AN-2094 LM3481 SEPIC Evaluation Board (Rev

AP8801  500mA LED STEP-DOWN CONVERTER Description
AP8801 500mA LED STEP-DOWN CONVERTER Description

... When a low frequency PWM signal with voltages between 2.5V and a low level of zero is applied to the CTRL pin the output current will be switched on and off at the PWM frequency. The resultant LED current ILEDavg will be proportional to the PWM duty cycle. See figure 18. A Pulse Width Modulated (PWM ...
BD9870FPS
BD9870FPS

application note
application note

AN-9759
AN-9759

... power class. During this step, the GreenBridge device should not compromise the resistance detection procedure by bypassing the current through the body diode. The recommended gate drive circuit in Error! Reference source not found. helps the GreenBridge device stay turned off and bypasses the curre ...
FDS6676AS 30V N SyncFET
FDS6676AS 30V N SyncFET

... The FDS6676AS is designed to replace a single SO-8 MOSFET and Schottky diode in synchronous DC:DC power supplies. This 30V MOSFET is designed to maximize power conversion efficiency, providing a low ...
Wideband, Low-Power, Current Feedback Operational Amplifier OPA694 FEATURES
Wideband, Low-Power, Current Feedback Operational Amplifier OPA694 FEATURES

... impedance is set to 50Ω with a resistor to ground and the output impedance is set to 50Ω with a series output resistor. Voltage swings reported in the Electrical Characteristics are taken directly at the input and output pins, while load powers (dBm) are defined at a matched 50Ω load. For the circui ...
An Excessive Current Subtraction Technique to Improve
An Excessive Current Subtraction Technique to Improve

SLUS746 120-V Boot, 3-A Peak, High Frequency, High
SLUS746 120-V Boot, 3-A Peak, High Frequency, High

ADD8754-EVAL Evaluation Kit for LCD Power
ADD8754-EVAL Evaluation Kit for LCD Power

... a voltage divider or Zener diode can be used to set this voltage. If a voltage divider is used, a low divider impedance (<1 kΩ) is recommended. See the ADD8754 data sheet for more ...
STPM01 programmable, single-phase energy
STPM01 programmable, single-phase energy

... voltage and current channels merely appears as a gain error, which can be calibrated. When voltage and current are not in phase, crosstalk will have a non-linear effect on the measurements, which cannot be calibrated. Crosstalk is minimized by means of good PCB planning and the proper use of filter ...
Low-Drift, Low-Power, Dual-Output, VREF and VREF / 2 Voltage
Low-Drift, Low-Power, Dual-Output, VREF and VREF / 2 Voltage

... (8 ppm/°C, max) and initial accuracy (0.05%) on both the VREF and VBIAS outputs while operating at a quiescent current less than 430 µA. In addition, the VREF and VBIAS outputs track each other with a precision of 6 ppm/°C (max) across the temperature range of –40°C to 85°C. All these features incre ...
CMOS Device Model
CMOS Device Model

DS1270Y/AB 16M Nonvolatile SRAM FEATURES PIN ASSIGNMENT
DS1270Y/AB 16M Nonvolatile SRAM FEATURES PIN ASSIGNMENT

... 8. If WE is low or the WE low transition occurs prior to or simultaneously with the CE low transition, the output buffers remain in a high-impedance state during this period. 9. Each DS1270 has a built-in switch that disconnects the lithium source until the user first applies VCC. The expected tDR ...
MAX16838 Evaluation Kit Evaluates: General Description Features
MAX16838 Evaluation Kit Evaluates: General Description Features

... Note: Indicate that you are using the MAX16838 when contacting these component suppliers. ...
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Current mirror

A current mirror is a circuit designed to copy a current through one active device by controlling the current in another active device of a circuit, keeping the output current constant regardless of loading. The current being 'copied' can be, and sometimes is, a varying signal current. Conceptually, an ideal current mirror is simply an ideal inverting current amplifier that reverses the current direction as well or it is a current-controlled current source (CCCS). The current mirror is used to provide bias currents and active loads to circuits. It can also be used to model a more realistic current source (since ideal current sources don't exist).The circuit topology covered here is one that appears in many monolithic ICs. It is a Widlar mirror without an emitter degeneration resistor in the follower (output) transistor. This topology can only be done in an IC as the matching has to be extremely close and cannot be achieved with discretes.Another topology is the Wilson mirror. The Wilson mirror solves the Early effect voltage problem in his design.
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