Patent ID: 11870363
Assignee: CYPRESS SEMICONDUCTOR CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 6:
7. The secondary side controller of claim 1, wherein the IC further comprises:
a diode coupled between the capacitor and the ground;
a second current mirror that receives, as input current, a second reference current from a second variable current source; and
a valley detect transistor having a gate coupled to ground, a source coupled to the diode-connected transistor, and a drain coupled to an output of the second current mirror, wherein the drain of the valley detect transistor is to:
transition to a low voltage in response to a voltage at the diode swinging towards a negative voltage; and
transition to a high voltage in response to the voltage at the diode swinging back toward a positive voltage.