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Sinking vs Sourcing Digital Outputs
A sinking digital (input/output) provides a grounded connection to the load, whereas a sourcing digital (input/output) provides a voltage source to a grounded load. Typically, a device will specify whether its interface terminals are sinking or sourcing and any necessary power supply/loading considerations.
Figure 1: Sinking digital output is connected to a sourcing digital input. In this circuit, the load is pulled to ground by the provided sinking digital output.
- Sinking Output: the device’s output signal does not provide power. It must be connected to a sinking input with a power supply loop or a sourcing input.
- Sourcing Input: the device receiving the signal provides power for the input signal. It must be connected to a sinking output, such as a 2-wire transmitter, which uses the power from the receiving device.
Figure 2: Sourcing digital output is connected to a sinking digital input. In this circuit, the load is pulled up to receive the voltage provided by the sourcing digital output.
- Sourcing Output: The device’s output signal powers the output circuit. It must be connected to a receiving device that provides no power and acts as a resistive load, such as a 2-wire transmitter.
- Sinking Input: the device receiving the input signal does not provide power. It must be connected to a sinking output with a power supply loop or a sourcing output or a sinking output.
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FAQs on Sinking and Sourcing - Digital Electronics - Electrical Engineering (EE)
| 1. क्या फैन आउट ऑफ लॉजिक गेट्स क्या है और इसका महत्व क्या है? |  |
| 2. नॉइज मार्जिन क्या है और क्यों यह महत्वपूर्ण है? | |
उत्तर: नॉइज मार्जिन एक सुरक्षा मार्जिन होता है जो गेट के ओपरेशन को स्टेबल रखने में मदद करता है, यह अंतर होता है गेट की ओपरेशनल वोल्टेज और उसके दोनों तरफ के स्थिर वोल्टेज के बीच।
| 3. फैन-ऑफ क्या है और क्यों यह जरूरी है? | |
उत्तर: फैन-ऑफ एक अंश है जो गेट के आउटपुट को ड्राइव करने के लिए जिम्मेदार होता है, यह गेट की प्रदर्शन को सुनिश्चित करता है और गेट की स्थिरता बनाए रखने में मदद करता है।
| 4. लॉजिक गेट्स के फैन आउट और नॉइज मार्जिन का संबंध क्या है? | |
उत्तर: फैन आउट और नॉइज मार्जिन दोनों ही लॉजिक गेट्स के प्रदर्शन और स्थिरता के मापदंड हैं, जो गेट की क्षमता और सुरक्षा को दर्शाते हैं।
| 5. क्या फैन आउट और फैन-ऑफ में अंतर है और वे कैसे गेट्स के प्रदर्शन को प्रभावित करते हैं? | |
उत्तर: फैन आउट और फैन-ऑफ दोनों ही गेट के आउटपुट और उसकी स्थिरता में महत्वपूर्ण भूमिका निभाते हैं, जो गेट की प्रदर्शन को सुनिश्चित करते हैं।
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