710 views

4 Answers

2 votes
2 votes

Option B is False.

SRAM circuits require more area, because an SRAM memory cell requires four to six transistors, compared to a single transistor and a capacitor for DRAM. As a result, data density is much lower in SRAM than in DRAM. 

0 votes
0 votes
A. True . DRAM consume more power as compared to SRAM.

C. TRUE. Refreshing required because of capacitors.

D. TRUE. DRAM are cheap so widely used as main memory component.

B.  FALSE. SRAM require more transistor (GATE) per bit  than DRAM.
0 votes
0 votes
Option B is false.. when we talk about gate density then we are talking about the flip-flops or the gate which actually hold the data, in SRAM there is only 1-D Flipflop and 6 control gates which manage the proper functioning of the FF. In case of DRAM there less overhead of such control gates, therefore more capacitors can be put into the same area, thus increasing the chip package density.
0 votes
0 votes

Answer should be C, as read cycle itself refreshes the value. we don't need a memory refresh cycle again.

https://gateoverflow.in/?qa=blob&qa_blobid=12537040844512335301

the memory on a dynamic RAM memory chip is organized in a matrix formed by rows and columns of memory cells. The simplest type of dynamic RAM cell contains only one transistor and one capacitor.  Whether a 1 or 0 is contained in a cell is determined by whether or not there is a charge on the capacitor. During a read operation, one of the row select lines is brought high by decoding the row address (low-order address bits). The activated row select line turns on the switch transistors  for all cells in the selected row. This causes the refresh amplifier associated with each column to sense the voltage level on the corresponding capacitor and interpret it as a 0 or a 1. If it is more than 50 percent, it reads it as a 1; otherwise it reads it as a 0. The column address (high-order address bits) enables one cell in the selected row for the output. The read cycle is actually a read/write cycle. If a '1' is read then the cell is re-written to with a '1' to recharge it. However if a '0' is read no recharge is necessary.

Related questions

0 votes
0 votes
0 answers
1
1 votes
1 votes
2 answers
3