All About Bi-CMOS Technology

Today will discuss what Bi-CMOS Technology is. Bipolar CMOS is a semiconductor technology that combines two individual semiconductor technologies. It combines a Bipolar Junction Transistor and Complementary Metal-Oxide-Semiconductor (CMOS) gate in an isolated integrated electric circuit. It shows remarkable properties for high-frequency analog amplifiers and offers high speed and low output resistance. CMOS is fantastic for developing basic and efficient, low power logic gates and offers high input resistance. 

Since the two kinds of transistors have existed in production, designers who have utilized both the transistors independently have understood the advantages of combining the two technologies. Due to the absence of execution in integrated circuits, this application was confined to genuinely simple circuits. 

History of Bi-CMOS Technology

The history of semiconductors was initiated in the 1930s when Lienfed and Heil first proposed the theory of MOSFET. In July of 1968, Hung-Chang Lin and Ramachandra Iyer displayed an integrated BiMOS amplifier, integrating Bipolar Junction Transistor (BJT) and Metal-Oxide-Semiconductor (MOS) technologies.

In 1984 Hitachi research team led by H. Higuchi demonstrated Bi-CMOS large-scale integration. In BiCMOS, both MOS and BJT are fabricated on the same chip. 

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Objective of Bi-CMOS Technology

  • The major goal of Bi-CMOS is to integrate bipolar and CMOs to completely utilize the advantages of both technologies.
  • Bi-CMOS has now become one of the most dominant technologies utilized in high speed, low power, and exceptional functional VLSI circuits.
  • The essential way to deal to enhance the performance of Bi-CMOS is the addition of bipolar process steps to a standard CMOS process.
  • The Bi-CMOS gates can be utilized as a compelling method of speeding up the VLSI circuits.
  • The applications of Bi-CMOS are endlessly spread.
  • Bi-CMOS enables high performance integrated circuits but also increase process complexity
  • The major drawback of Bi-CMOS is the higher costs because of the added process
  • Created current drive over CMOS and packing density of bipolar.
  • It consist high input impedance and low output impedance.
  • Improved speed over purely CMOS technology.

Characteristics of CMOS Technology

Know what are the characteristics of CMOS technology:

  • It has higher noise margins, density, and high yield with large integrated complex functions
  • High input impedance and high delay load sensitivity
  • It has a lower static power dissipation
  • Low output drive current, low gain, and low transconductance
  • A near-ideal switching device
  • Bi-directional capability
  • Scaleable threshold voltage

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Difference between Bi-Polar and CMOS Technology

Bi-Polar TechnologyCMOS Technology
High power dissipationLow static power dissipation
Low input impedanceHigh input impedance
Low voltage swing logicScalable threshold voltage
Low packing density High packing density
High drive currentLow output drive current

Advantages of Bi-CMOS Technology

Below are the advantages of bicmos technology: 

  • Such technology boost speed over CMOS.
  • Generate current drive over CMOS.
  • It boosts the packing density above bipolar.
  • Bi-CMOS technology has lower power consumption than bipolar
  • Has high input impedance.
  • And it has low output impedance.
  • As well as has high gain and low noise.

Disadvantages of Bi-CMOS Technology

Followings are the disadvantages of Bi-CMOS technology:

  • This technology boost manufacturing process complications
  • It has many advantages but it consists of a higher cost.
  • Due to scaling, speed degradation happens.
  • Bicmos fabrication -This technology has a longer fabrication cycle time.

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Advantages of CMOS Technology

Following are the advantages of CMOS technology:

  • Definitely is has amazing high operating Speed. 
  • It is of low cost.
  • One of the major advantages is it has very low static power consumption.
  • The high degree of noise immunity.

Disadvantages of CMOS Technology

Followings are the disadvantages of CMOS technology:

  • CMOS technology consists of material limitations.
  • As well as it has space limitations.

Applications of Bi-CMOS Technology

Let’s see the applications of Bi-CMOST technology:

  • Full custom IC’s
  • SRAM and DRAM
  • Microprocessor controller
  • Semi-custom IC’s
  • Register, flipflop, standard cells 
  • Address, mixers
  • ADC, Gate arrays
  • Flash A/D converters

Applications of CMOS Technology

Let us see applications of CMOS technology:

  • CMOS is utilized in low power design devices. Low power is consumed in this technology circuits
  • All the semiconductor devices utilize CMOS Technology 
  • Satellites utilizing sensors developed CMOS Technology
  • Image sensors – A sensor that identifies and transmits data utilized to create an image.
  • Integrated transceivers – Servers complete high-performance RF and mixed-signal system on a chip. 
  • Data converters – An electronic circuit that transforms data of a particular form to another form. 
  • Logic circuits – It implements processing/ controlling activities in a computer. 

So this is all about Bi-CMOS Technology. Info At One always tries to provide you guys with perfect information related to the topic. So stay tune-up for more such technology articles.

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