operational transconductance amplifier การใช้

• The "'LM13700 "'is an integrated circuit consisting of two current controlled operational transconductance amplifiers ( OTA ), each having differential inputs and a push-pull output.
• Such is the case with the operational transconductance amplifier, which has an open-loop gain ( transconductance ) in siemens ( mhos ), because the gain is a ratio of the output current to the input voltage.
• The "'operational transconductance amplifier "'( "'OTA "') is an amplifier whose differential input voltage produces an output impedance differential input stage and that it may be used with negative feedback.
• For example, solid-state circuitry such as operational transconductance amplifiers operated open loop, or MOSFET cascades of CMOS inverters, are frequently used in commercial applications to generate softer clipping than what is provided by generic triode gain stages.
• Where Vz-= Iz . Zz \, and Zz \, is the external impedance connected to z terminal of the CDTA . CDTA can be thought as a combination of a current differencing unit followed by a dual-output operational transconductance amplifier, DO-OTA . Ideally, the OTA is assumed as an ideal voltage-controlled current source and can be described by Ix = gm . ( V +-V-) \,, where Ix is output current, V + \, and V-\, denote non-inverting and inverting input voltage of the OTA, respectively.