Invention Grant
- Patent Title: Ring frequency divider
- Patent Title (中): 振铃分频器
-
Application No.: US15159750Application Date: 2016-05-19
-
Publication No.: US09595971B2Publication Date: 2017-03-14
- Inventor: Yousof Mortazavi , John L. Melanson , Aaron Brennan
- Applicant: Cirrus Logic International Semiconductor Ltd.
- Applicant Address: US TX Austin
- Assignee: CIRRUS LOGIC, INC.
- Current Assignee: CIRRUS LOGIC, INC.
- Current Assignee Address: US TX Austin
- Agency: Norton Rose Fulbright US LLP
- Main IPC: H03K23/54
- IPC: H03K23/54 ; G04F10/02 ; H03M1/50 ; H03K3/03 ; H03L7/089 ; H03L7/099 ; H03K3/037

Abstract:
A circuit for a divider or counter may include a frequency divider having multiple rings for dividing an input frequency to obtain an output frequency. The first and second rings may include an odd-numbered plurality of elements, such as inverters, wherein each inverter of a ring is coupled to another inverter of the ring in a circular chain. An input frequency may be input to a power supply input of inverters of the first ring. The second ring inverters may be coupled at a power supply input to output nodes of the first ring inverters, which results in the second ring operating at a divisional rate of the first frequency given by (N−1), where N is the number of inverters in the ring. The circuits may be used in frequency dividers and counters, such as in phase-locked loops (PLLs) and analog-to-digital converters (ADCs).
Public/Granted literature
- US20160344392A1 RING FREQUENCY DIVIDER Public/Granted day:2016-11-24
Information query
IPC分类: