CiFET

Complementary Current-Injection Field-Effect Transistor

A CiFET is a pair of Complementary iFETs connected at their Drain with a Common Gate and support 2 Non-Inverting Current Injection Ports (iPort)

Source Channel
  • Characteristic (Rin) Resistance

  • Absorbs iPort Input Energy

  • Constant Channel Current

  • High Conductance

  • Very High Speed

  • Low Noise

  • Wide Dynamic Range

Drain Channel
  • Reacts to iPort Input Current

  • Common-Gate Stage

  • Low Noise

NiFET (N-type Current Field Effect Transistor)

CiFET are 2 iFETs Connected with a Common Gate and 2 Current Injection Ports (iPort)

iPort Operation is similar to a BiPolar transistor: a base current is input into a Vbe.

The CiFET iIn is also valid in either direction as well as zero; yielding no crossover discontinuity.

All input modes are precisely linear & algebraically sum.

 The width to length ratios of the source and drain channels can be adjusted for different performance optimizations.

~3*Wider P-channels can balance out P-to-N mobility differences for electrical symmetry.

Abundant carrier sub-surface conduction provides high-speed with low resistance and low surface trap noise, without speed-limiting carrier velocity saturation.  Ultra-Linear transfer function is a result of complementary cancellation of higher-order terms.

CiFET™ is a Platform for Semiconductor Amplifier Devices

CiFET
Inverting Voltage Gain

CiFET
Current Inverter

CiFET
Voltage to Current FET

CiFET
Complementary Current-Injection FET

Input Signal Voltage In Current In Voltage In Current In
Output Signal Voltage Out Current Out Current Out Voltage Out
Gain mu (µ) Beta (β) Transconductance (gm) TransResistance (rm)
Controlled By Voltage at Gate N-Channel Current
P-Channel Current
Both Currents
Voltage at Gate N-Channel Current
P-Channel Current
Both Currents
iPort (inputs) Injection Port Not Used Injection Port Current In P-Channel
Injection Port Current In N-Channel
Injection Port Current In Both Channels
Injection Port Not Used Injection Port Current In P-Channel
Injection Port Current In N-Channel
Injection Port Current In Both Channels
iPort (outputs) Injection Port Not Used Injection Port Current Out P-Channel
Injection Port Current Out N-Channel
Injection Port Current Out Both Channels
Injection Port Not Used Injection Port Current Out P-Channel
Injection Port Current Out N-Channel
Injection Port Current Out Both Channels
Impedance High Input Impedance
Low Output Impedance
Low Input Impedance
High Output Impedance
High Input Impedance
Low Output Impedance
Low Input Impedance
High Output Impedance