Methods of manufacture for a low control voltage switch
View Patent ↗A low control voltage switch utilizing a plurality of field effect transistors (FETs) having a total of six gates to allow the switch to operate at a low control voltage without the need to increase device periphery or die size. Feed-forward capacitors connected between the gate and source of an uppermost FET and the gate and drain of a lowermost FET are used to reduce signal distortion and improve the linearity and harmonic noise rejection characteristics of the FETs within the switch and thus lower the harmonics of the switch.
1. A method for producing a switch operating at a low control voltage, the method comprising:
forming a plurality of field effect transistors (FETs) connected together in series, wherein the plurality of FETs have six gates therebetween;
connecting a first FET to a source voltage source;
connecting each gate to a control voltage source; and
connecting a last FET to an output.
2. The method of claim 1 , further comprising connecting at least one feed forward capacitor to one of the plurality of FETs.
3. The method of claim 2 , wherein said connecting at least one feed forward capacitor includes connecting the feed forward capacitor between a gate and either a source or a drain of the one of the plurality of FETs.
4. The method of claim 2 , wherein said connecting at least one feed forward capacitor includes connecting a first feed-forward capacitor to a source and a gate of a first FET and a second feed-forward capacitor to a drain and a gate of a last FET.
5. The method of claim 1 , further comprising connecting a resistance between at least a subset of the six gates and the control voltage source.
6. The method of claim 1 , further comprising connecting a resistance in parallel to at least a subset of the FETs.
7. The method of claim 6 , wherein said connecting a resistance in parallel includes connecting a resistor in parallel to all of the plurality of FETs.
8. The method of claim 6 , wherein said connecting a resistance in parallel includes connecting a resistor in parallel to each FET of the plurality of FETs.