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How many transistors are in a DRAM?
The advantage of DRAM is the structural simplicity of its memory cells: only one transistor and a capacitor are required per bit, compared to four or six transistors in SRAM. This allows DRAM to reach very high densities, making DRAM much cheaper per bit.
Are BJT transistors still used?
Yes, BJTs are still used. BJTs have higher transconductance, which gives them higher gain. They are ideal for amplifiers, where you want to maximize the gain. There is actually considerable amount of research going on in how to replicate the BJT performance in CMOS technology, especially for satellite applications.
Which MOSFET is used in DRAM?
Integrated DRAM uses MOSFETs but they differ from the discrete form because of the intrinsic diode with the substrate : it takes two discrete MOSFET to make one normal MOSFET. This would not be cost-effective to use discrete MOSFET to implement classic DRAM circuits.
How is DRAM made?
Pronounced DEE-RAM, DRAM is widely used as a computer’s main memory. Each DRAM memory cell is made up of a transistor and a capacitor within an integrated circuit, and a data bit is stored in the capacitor.
Is DRAM and RAM the same?
There are two main types of RAM: Dynamic RAM (DRAM) and Static RAM (SRAM). DRAM (pronounced DEE-RAM), is widely used as a computer’s main memory. It keeps data in the memory as long as power is supplied to the system unlike DRAM, which has to be refreshed periodically.
Why do you use a BJT as a switch?
There are plenty of reasons why you would use a BJT or a transistor as a switch. But for me, I think the main reason is driving a load with higher current consumption or voltage. For example, your load requires 100mA but you can only draw 20mA from your source, which is common for a GPIO pin of a microcontroller.
What is the property of a BJT transistor makes it an amplifier?
In some circuits indeed a higher β will give you more amplification. For example, a transistor controlling a relay. When β is increased, we could use a smaller base current. In others it will not give you more amplification. For example, a Common Emitter amplifier, assuming we do not change the DC current I C.
What’s the easiest way to make a transistor?
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What is the minimum base current for a BJT?
I C (sat) is the current that the load R C requires. V CE (sat) is specified in the datasheet of the BJT that you are going to use. After calculating I C (sat), the next thing to figure out is the minimum base current, I B (min), needed to make sure to produce I C (sat).