So I know a transistor is built to amplify or multiple an input signal using a base voltage. Are there such transistors that are analog? That is the output voltage is amplified depending on the base voltage? If so, is there analogously a transistor that divides instead of multiplies? That is where the base voltage is in the denominator and reduces the output voltage if the base voltage is increased? Basically I am looking for a transistor that can perform the analog computation analogy of mathematical division.