Invention Grant
- Patent Title: Programmable frequency divider
- Patent Title (中): 可编程分频器
-
Application No.: US12731591Application Date: 2010-03-25
-
Publication No.: US08134389B2Publication Date: 2012-03-13
- Inventor: Zhibin Huang
- Applicant: Zhibin Huang
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.
- Agent Lawrence J. Merkel; Erik A. Heter
- Main IPC: H03B19/00
- IPC: H03B19/00

Abstract:
A clock divider and method of operating the same. In various embodiments, the clock divider may be configured to divide clock frequencies by both even and odd divisors. The divisor may be an integer that is represented by an N-bit value, and the clock divider may be programmable by writing the N-bit value to a register. The divisor may be even or odd. During operation, the clock divider may decrement a counter down from an initial value (derived from the N-bit value representing the divisor) to a trigger value. When the trigger value is detected, the clock divider may cause the output clock to toggle. The trigger value may depend on whether the divisor is even or odd. The clock divider may be re-programmed during operation by writing a new N-bit value into the register. Re-programming may include changing the divisor from an even value to an odd value.
Public/Granted literature
- US20110234265A1 Programmable Frequency Divider Public/Granted day:2011-09-29
Information query