Use of analog-valued floating-gate transistors for parallel and serial signal processing
View Patent ↗Analog-valued floating-gate transistors are used as trimmable circuit components for modifying and/or controlling the gain, phase, offset, frequency response, current consumption, and/or transfer function of signal pathways in parallel and/or serial processing circuits in radio frequency, analog, or mixed-signal integrated circuits.
1. An amplifier circuit, comprising:
a signal input node;
a signal output node;
a p-channel floating gate transistor having a source, a drain and a floating gate; and
an n-channel floating gate transistor having a source, a drain and a floating gate,
wherein the source of the p-channel floating gate transistor is electrically coupled to a source of electrical power of a first electrical potential, the source of the n-channel floating gate transistor is electrically coupled to a source of electrical power of a second electrical potential, the drains of the p-channel floating gate transistor and the n-channel floating gate transistor are electrically coupled to said output node, and the floating gates of the n-channel floating gate transistor and the p-channel floating gate transistor are electrically coupled to said signal input node.
2. The amplifier circuit in accordance with claim 1 , wherein the electrical coupling between the floating gates of the n-channel floating gate transistor, the p-channel floating gate transistor and said signal input node comprise a floating gate transistor having its floating gate electrically coupled to the floating gates of the n-channel floating gate transistor and the p-channel floating gate transistor and its source and drain electrically coupled together and to said signal input node.
3. The amplifier circuit in accordance with claim 1 , wherein the floating gates of the n-channel floating gate transistor and the p-channel floating gate transistor are electrically coupled to said output node with a MOSCAP having a MOSCAP floating gate.
4. The amplifier circuit in accordance with claim 3 , further comprising means for injecting electrons on to said MOSCAP floating gate.
5. The amplifier circuit in accordance with claim 4 , further comprising means for tunneling electrons off of said MOSCAP floating gate.
6. The amplifier circuit in accordance with claim 5 , wherein the electrical coupling between the floating gates of the n-channel floating gate transistor, the p-channel floating gate transistor and said signal input node comprises a floating gate transistor having its floating gate electrically coupled to the floating gates of the n-channel floating gate transistor and the p-channel floating gate transistor and its source and drain electrically coupled together and to said signal input node.
7. The amplifier circuit in accordance with claim 6 , wherein:
the floating gates of the n-channel floating gate transistor and the p-channel floating gate transistor are coupled to a first floating gate node.
8. The amplifier circuit in accordance with claim 7 , further comprising:
an injector disposed to inject electrons onto said first floating gate node.
9. The amplifier circuit in accordance with claim 8 , further comprising:
a tunneling junction disposed to remove electrons from said first floating gate node.
10. The amplifier circuit in accordance with claim 9 , wherein the electrical coupling between the floating gates of the n-channel floating gate transistor, the p-channel floating gate transistor and said signal input node comprise a floating gate transistor having its floating gate electrically coupled to the floating gates of the n-channel floating gate transistor and the p-channel floating gate transistor and its source and drain electrically coupled together and to said signal input node.
11. The amplifier circuit in accordance with claim 10 , wherein the floating gates of the n-channel floating gate transistor and the p-channel floating gate transistor are electrically coupled to said output node with a MOSCAP having a MOSCAP floating gate.