Title:
【発明の名称】リング発振器,リング発振器の補償回路及びリング発振器の補償方法
Document Type and Number:
Japanese Patent JP3144700
Kind Code:
B2
Abstract:
A compensation circuit (14) for a ring oscillator (12) having an odd plurality of series-connected CMOS inverter stages includes first and second P-channel transistors and a resistor. The first transistor (32) has a source coupled to VDD and a gate coupled to ground. The resistor (34) is coupled between the drain of the first transistor and ground. The second transistor (36) has a source coupled to VDD, a gate coupled to the drain of the first transistor, and a drain coupled to a supply node of each of the inverter stages of the ring oscillator for providing a supply voltage that is compensated with respect to voltage, temperature, and semiconductor processing variables. In operation, the conductivity of the first transistor inversely controls the conductivity of the second transistor that supplies a compensated power to the inverter stages. The compensated power controls the conductivity of the transistors in the ring oscillator and the corresponding frequency of oscillation.
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Inventors:
Daryl E. Anderson
Application Number:
JP35910691A
Publication Date:
March 12, 2001
Filing Date:
December 27, 1991
Export Citation:
Assignee:
AGILENT TECHNOLOGIES, INC.
International Classes:
H03K3/011; H03K3/03; H03K3/354; H03L1/00; (IPC1-7): H03K3/354
Attorney, Agent or Firm:
Kimihisa Kato