Patent ID: 11901863
Assignee: STMICROELECTRONICS S.R.L.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An apparatus comprising:
a first oscillator circuit comprising:
a first transistor and a second transistor, wherein a gate terminal of the first transistor and a gate terminal of the second transistor are coupled to a first node, wherein a first load path terminal of the first transistor and a first load path terminal of the second transistor are coupled to a reference voltage node; and
a first LC tank circuit comprising:
a first capacitor coupled between a second load path terminal of the first transistor and a second load path terminal of the second transistor; and
a first coil coupled in parallel with the first capacitor;

a second oscillator circuit comprising:
a third transistor and a fourth transistor, wherein a gate terminal of the third transistor and a gate terminal of the fourth transistor are coupled to a second node, wherein a first load path terminal of the third transistor and a first load path terminal of the fourth transistor are coupled to a center tap of the first coil; and
a second LC tank circuit comprising:
a second capacitor coupled between a second load path terminal of the third transistor and a second load path terminal of the fourth transistor; and
a second coil coupled in parallel with the second capacitor, wherein a center tap of the second coil is coupled to a supply voltage node;

a third capacitor coupled between the second load path terminal of the first transistor and the second load path terminal of the third transistor; and
a fourth capacitor coupled between the second load path terminal of the second transistor and the second load path terminal of the fourth transistor.