How does photodiode pin work?
PIN photodiode is a kind of photo detector, it can convert optical signals into electrical signals. The PIN photo diode operates with an applied reverse bias voltage and when the reverse bias is applied, the space charge region must cover the intrinsic region completely.
What is the advantage of PIN photodiode?
Advantages and Disadvantages of PIN Photodiode The advantage is its high-frequency response and its frequency response is also greater than Cadmium – Sulphide photodetector. It is inexpensive and the response time is in nanoseconds which make it appropriate for electronic circuitry.
What are the advantages of PIN photodiode over pn junction?
The major advantage of the PIN photodiode, compared to the P-N junction, is the high response speed from the increased depletion region.
What is Si PIN?
The Si-PIN is a high performance thermoelectrically cooled X-ray detector and can be combined with several preamplifier and digital pulse processor configurations. It is typically used in laboratory X-ray spectroscopy applications requiring moderate energy resolution and moderate count rates where cost is important.
Which one is true about PIN photodiode?
Which of the following is true about a PIN diode? Explanation: Due to increased depletion region, the covalent bonds break and increase the surface area for photosensitivity. This property is used in fields of light sensors, image scanners, artificial retina systems.
What is the difference between PIN photodiode and avalanche photodiode?
They are high-sensitivity, high-speed semiconductor light sensors. The main advantage of the APD is that it has a greater level of sensitivity compared to PIN. The avalanche action increases the gain of the diode many times, providing much higher sensitivity. However, an APD requires a higher operating voltage.
What are photodiodes used for?
Photodiodes are used in consumer electronics devices such as compact disc players, smoke detectors, medical devices and the receivers for infrared remote control devices used to control equipment from televisions to air conditioners. For many applications either photodiodes or photoconductors may be used.
What are the drawbacks of PIN photodiode?
Disadvantages of PIN diode :
- Less sensitivity.
- No internal gain.
- Small area.
- Slow response time.
- High reverse recovery time due to power loss are significant.
How does silicon drift detector work?
The basic form of the Silicon Drift Detector consists of a volume of fully depleted high-resistivity silicon, in which an electric field with a strong component parallel to the surface drives electrons generated by the absorption of ionizing radiation towards a small sized collecting anode.
How PIN diode is different from photodiode?
PIN diode : PIN photodiode does not have a high-intensity electric field region. Sensitivity is very low in PIN photodiode. The responsibility of a PIN diode is limited.
Why APD is better than PIN photodiode?
The main advantage of the APD is that it has a greater level of sensitivity compared to PIN. The avalanche action increases the gain of the diode many times, providing much higher sensitivity.
What are the characteristics of a PIN photodiode?
Basic PIN Photodiode Characteristics. The dynamic range is the range of incident light power over which the current output from the photodiode is linearly related to the input power and is sometimes expressed in decibels: This range for a typical device is from 1 picowatt to 10 milliwatts, or 100 dB 7.
How is the signal read in a photodiode array?
In a photodiode array (PDA), the signal (current) is outputted at each element’s unique anode and cathode. Therefore, the signal for the PDA can be read simultaneously, rather than sequentially and multiplexed. 8. What is the responsivity matching from device to device?
What is the shunt resistance of a photodiode?
Shunt resistance is basically the dark current when measured with a -10 mV applied reverse bias. This is the slope of the photodiode I-V curve at -10 mV. The -10 mV is chosen since theoretically there should be no dark current at 0V.
What is the noise current of a Si photodiode?
The Si photodiode noise current (in) is the sum of the thermal noise current or Johnson noise current (ij) of a resistor which approximates the shunt resistance (Rsh) and the shot noise currents (iSD and iSL) resulting from the dark current and the photocurrent. in = ij 2 + iSD2 + iSL [A] …………