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			          An Introduction to Digital Logic Families
			           
			          ELECTRONICS GURUKULAM: An Introduction to Digital Logic Families
			            http://electronicsgurukulam.blogspot.com/2013/02/an-introduction-to-digital-logic.html
			         
			       
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			          Logic Families - Power, Speed and Compatibility
			           
			          Logic Families, How logic families differ, CMOS, TTL, ECL. Device identification speed power and compatibility.
			            http://www.learnabout-electronics.org/Digital/dig31.php
			         
			       
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			          Digital Logic Families Part-I
			           
			          This page contains Digital Electronics tutorial, Combinational logic, Sequential logic, Kmaps, digital numbering system, logic gate truth tables, TTL and CMOS circuits.
			            http://www.asic-world.com/digital/logic1.html
			         
			       
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			          Logic family - Wikipedia, the free encyclopedia
			           
			          In Phillip's room with Frank and his brother, a logic family may refer to one of two related concepts.
			            https://en.wikipedia.org/wiki/Logic_family
			         
			       
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			          Logic Families Significance and Types
			           
			          Logic Families Significance and Types | Electrical4u
			            http://www.electrical4u.com/logic-families-significant-and-types/
			         
			       
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			          CMOS - Wikipedia, the free encyclopedia
			           
			          Complementary metal-oxide-semiconductor is a technology for constructing integrated circuits.
			            https://en.wikipedia.org/wiki/CMOS
			         
			       
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			          Emitter-coupled logic - Wikipedia, the free encyclopedia
			           
			          In electronics, emitter-coupled logic is a high-speed integrated circuit bipolar transistor logic family.
			            https://en.wikipedia.org/wiki/Emitter-coupled_logic
			         
			       
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			          Digital Electronics - Wikipedia, the free encyclopedia
			           
			          Digital electronics or digital (electronic) circuits are electronics that handle digital signals - discrete bands of analog levels - rather than by continuous ranges (as used in analogue electronics). All levels within a band of values represent the same numeric value.
			            https://en.wikipedia.org/wiki/Digital_electronics
			         
			       
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			          Diode-transistor logic - Wikipedia, the free encyclopedia
			           
			          Diode-transistor logic is a class of digital circuits that is the direct ancestor of transistor-transistor logic.
			            https://en.wikipedia.org/wiki/Diode%E2%80%93transistor_logic
			         
			       
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			          Resistor-transistor logic - Wikipedia, the free encyclopedia
			           
			          Resistor-transistor logic is a class of digital circuits built using resistors as the input network and bipolar junction transistors as switching devices.
			            https://en.wikipedia.org/wiki/Resistor%E2%80%93transistor_logic