What is Transconductor?

What is Transconductor?

The transconductor is a versatile building block employed in many analog and mixed-signal circuit applications, such as continuous-time filters, delta-sigma modulators, variable gain-amplifier or data converter. The transconductor is to perform voltage-to-current conversion.

What is the formula for transconductance?

It is usually used for direct current circuits. Formula used: gm=ΔIoutΔVin, where gm denotes the transconductance, (m for mutual), ΔIout denotes the current through the output and ΔVin represents the input voltage. It is used in bipolar junction transistors in order to measure its sensitivity.

What is the transconductance GM?

Transconductance is the property of certain electronic components. Conductance is the reciprocal of resistance; transconductance is the ratio of. the current change at the output port to the voltage change at the input port. It. is written as gm.

Which is IC of OTA?

The OTA, operational transconductance amplifier, concept is as basic as the transistor; once understood, it will broaden the designer’s horizons to new boundaries and make realizable designs that were previously unobtainable. Figure 1 shows an equivalent diagram of the OTA.

What is DC operating point?

A DC operating point, also known as quiescent or Q point, refers to the state of the transistor when no input current is applied to the component. Plotted on a chart, the DC operating point is the intersection of the base current and the DC load line.

What is Transresistance?

An amplifier which converts a current to a voltage. It is a familiar component in fiber-communications modules. The unit for transresistance is the ohm. See: Transimpedance Amplifier Buffers Current Transformer Synonyms.

Why is transconductance called GM?

Advanced Member level 1. The symbol ‘g’ is used for Conductance. The gm value is Idt/Vdt, also called the mutual conductance, so its notation is gm.

What is quiescent operating point?

Q point or the operating point of a device, also known as a bias point, or quiescent point is the steady-state DC voltage or current at a specified terminal of an active device such as a diode or transistor with no input signal applied.

How is MOSFET GM calculated?

1. Assuming MOSFET is in saturation, Id = (k’/2) (W/L) ( Vgs-Vt)^2 , where k’ is kp or kn. 2. The respective transconductance is given by gm= ∂Id/ ∂Vgs keeping Vds constant will give you a gm = k’ (W/L)(Vgs – Vt) = k’ (W/L) Vov, where Vov is overdrive voltage.

What is Miller OTA?

The proposed methodology was applied to the. synthesis of a Miller Operational Transconductor. Amplifier (OTA), a two-stage operational amplifier with a. feedback capacitor.

What is OTA and its application?

The proposed OTA utilizes conventional source degeneration with an auxiliary differential pair which increases the linear range significantly by reducing the distortion components. The proposed OTA is targeted for current mode circuit applications including low-frequency continuous time filters.

How is DC current shared in a transconductor?

The same transconductor output current is sourced into the IA output stage, thus determining a voltage drop on R2. proposed a 60-GHz transconductor consisting of a CS transistor whose DC current is shared by other two transistors [60].

How is a transductor used in a power system?

A transductor is type of magnetic amplifier used in power systems for compensating reactive power. It consists of an iron -cored inductor with two windings – a main winding through which an alternating current flows from the power system, and a secondary control winding which carries a small direct current.

How is transconductance related to field effect transistors?

Field effect transistors. Similarly, in field effect transistors, and MOSFETs in particular, transconductance is the change in the drain current divided by the small change in the gate/source voltage with a constant drain/source voltage.

When is the transconductor switched on in Figure 2?

At node (a) of Figure 2, for a positive half cycle of LO signal, [M.sub.3] is switched off while [M.sub.1] is switched on, resulting in the transconductor to be switched on.