Spread spectrum isolator
First Claim
Patent Images
1. A circuit package, comprising:
- a first die containing functional circuitry;
a second die containing functional circuitry; and
at least one RF isolation link interconnecting the first die and the second die, the RF isolation link providing voltage isolation between the first die and the second die, wherein the RF isolation link further provides digital data between the first die and the second die using an RF carrier signal which is transmitted therebetween when the digital data is at a first logic level and not transmitted when the digital data is at other than the first logic level, the RF carrier signal when the digital data is at the first logic level oscillating at a first frequency responsive to an input control signal at a first generated value and oscillating a second frequency responsive to the input control signal at a second generated value.
2 Assignments
0 Petitions
Accused Products
Abstract
A circuit package includes first and second units containing functional circuitry. At least one RF isolation link interconnects the first and second units and provides voltage isolation between the first and second units. The RF isolation link provides data between the first unit and the second unit using an RF carrier signal that sweeps between a first frequency and a second frequency.
152 Citations
18 Claims
-
1. A circuit package, comprising:
-
a first die containing functional circuitry; a second die containing functional circuitry; and at least one RF isolation link interconnecting the first die and the second die, the RF isolation link providing voltage isolation between the first die and the second die, wherein the RF isolation link further provides digital data between the first die and the second die using an RF carrier signal which is transmitted therebetween when the digital data is at a first logic level and not transmitted when the digital data is at other than the first logic level, the RF carrier signal when the digital data is at the first logic level oscillating at a first frequency responsive to an input control signal at a first generated value and oscillating a second frequency responsive to the input control signal at a second generated value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A circuit package, comprising:
-
a first die containing first functional circuitry; a second die containing second functional circuitry; a first transformer on the first die connected to the first functional circuitry; a second transformer on the second die connected to the second functional circuitry; a transmitter associated with the first transformer for transmitting a stepped RF carrier signal onto an RF isolation link between the first die and the second die; a receiver associated with the second transformer for receiving the stepped RF carrier signal over the RF isolation link; and circuitry associated with the first unit for generating the stepped RF carrier signal for transmission responsive to an input data signal at a first logical level wherein the stepped RF carrier signal sweeps between a first frequency and a second frequency and the generated RF carrier signal not transmitted responsive to the input data signal at a second logical level. - View Dependent Claims (10, 11, 12, 13, 14)
-
-
15. A circuit package, comprising:
-
a first unit containing functional circuitry; a second unit containing functional circuitry; a first transformer on the first unit; a second transformer on the second unit; a transmitter associated with the first transformer for transmitting a stepped RF carrier onto an isolation link between the first unit and the second unit; a receiver associated with the second transformer for receiving the stepped RF carrier over the isolation link; a slow ring oscillator; a divider circuit for providing a clock signal; a shift register for providing a plurality of output bits responsive to the clock signal and a data signal a first portion of the plurality comprising a randomly generated control code; logic circuitry for generating the data signal responsive to a second portion of the plurality of output bits; and an RC oscillator circuit responsive to the randomly generated control code for generating the stepped RF carrier signal, wherein the stepped RF carrier signal sweeps between a first frequency and a second frequency and the randomly generated control code causes the generation of one of a plurality of frequencies from the first frequency to the second frequency. - View Dependent Claims (16, 17, 18)
-
Specification