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[[File:bicmos inverter.svg|thumb||right|150px|[[BiCMOS]] [[NOT gate]]]]
 
[[File:bicmos inverter.svg|thumb||right|150px|[[BiCMOS]] [[NOT gate]]]]
 
A simple BiCMOS inverter can be constructed from a pair of [[MOS]] transistor and NPN transistors. Each of the MOS transitors are cascaded with an [[NPN transistor]]. When the input is HIGH, the [[NMOS transitor]] is conducting becoming the base current for the Q<sub>2</sub> NPN transistor causing the discharge current to drop. Conversely when the input is LOW, the [[PMOS transistor]] is conducting becoming the base current for the Q<sub>1</sub> NPN transistor, causing the output the increase.
 
A simple BiCMOS inverter can be constructed from a pair of [[MOS]] transistor and NPN transistors. Each of the MOS transitors are cascaded with an [[NPN transistor]]. When the input is HIGH, the [[NMOS transitor]] is conducting becoming the base current for the Q<sub>2</sub> NPN transistor causing the discharge current to drop. Conversely when the input is LOW, the [[PMOS transistor]] is conducting becoming the base current for the Q<sub>1</sub> NPN transistor, causing the output the increase.
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== Logic Families/Types ==
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Various types of BiCMOS gates were devised over time to overcome different issues, some of the common ones are listed below:
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===Conventional BiCMOS===
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{{main|bicmos/conventional|Conventional BiCMOS}}
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{{empty section}}
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===R-Type===
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{{main|bicmos/r-type|R-Type BiCMOS}}
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{{empty section}}
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===R+N-Type===
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{{main|bicmos/r+n-type|R+N-Type BiCMOS}}
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{{empty section}}
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===FS-Type===
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{{main|bicmos/fs-type|FS-Type BiCMOS}}
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{{empty section}}
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===FB-Type===
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{{main|bicmos/fb-type|FB-Type BiCMOS}}
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{{empty section}}
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===BiNMOS===
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{{main|bicmos/binmos|BiNMOS}}
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{{empty section}}
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===BiPNMos===
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{{main|bicmos/bipnmos|BiPNMos}}
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{{empty section}}
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===CBiCMOS===
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{{main|bicmos/cbicmos|CBiCMOS}}
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{{empty section}}
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===MBiCMOS===
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{{main|bicmos/mbicmos|MBiCMOS}}
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{{empty section}}
  
 
== See also==
 
== See also==

Revision as of 16:19, 17 November 2015

BiCMOS (Bipolar-CMOS) is a technique for constructing analog and digital logic circuits from both CMOS and Bipolar semiconductor technologies.

Overview

Bipolar transistors have a higher current output per unit input capacitance. CMOS on the other hand is low-power, has wide noise margin and high nput impedance. BiCMOS makes use of those excellent current drive characteristics to build buffers that can quickly drive large fanouts. It attempts to provide improved speed over CMOS and lower power dissipation than bipolar by combining both technologies on a single die. BiCMOS fabrication therefore ends up being considerably more expensive due to the increase mask count.

Inverter Example

Main article: inverter#BiCMOS
BiCMOS NOT gate

A simple BiCMOS inverter can be constructed from a pair of MOS transistor and NPN transistors. Each of the MOS transitors are cascaded with an NPN transistor. When the input is HIGH, the NMOS transitor is conducting becoming the base current for the Q2 NPN transistor causing the discharge current to drop. Conversely when the input is LOW, the PMOS transistor is conducting becoming the base current for the Q1 NPN transistor, causing the output the increase.

Logic Families/Types

Various types of BiCMOS gates were devised over time to overcome different issues, some of the common ones are listed below:

Conventional BiCMOS

Main articles: bicmos/conventional and Conventional BiCMOS
New text document.svg This section is empty; you can help add the missing info by editing this page.

R-Type

Main articles: bicmos/r-type and R-Type BiCMOS
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R+N-Type

Main articles: bicmos/r+n-type and R+N-Type BiCMOS
New text document.svg This section is empty; you can help add the missing info by editing this page.

FS-Type

Main articles: bicmos/fs-type and FS-Type BiCMOS
New text document.svg This section is empty; you can help add the missing info by editing this page.

FB-Type

Main articles: bicmos/fb-type and FB-Type BiCMOS
New text document.svg This section is empty; you can help add the missing info by editing this page.

BiNMOS

Main articles: bicmos/binmos and BiNMOS
New text document.svg This section is empty; you can help add the missing info by editing this page.

BiPNMos

Main articles: bicmos/bipnmos and BiPNMos
New text document.svg This section is empty; you can help add the missing info by editing this page.

CBiCMOS

Main articles: bicmos/cbicmos and CBiCMOS
New text document.svg This section is empty; you can help add the missing info by editing this page.

MBiCMOS

Main articles: bicmos/mbicmos and MBiCMOS
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See also


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