公开(公告)号：CA2214221C

公开(公告)日：2000-06-06

申请号：CA2214221

申请日：1997-08-28

Applicant: ATI TECHNOLOGIES INC

Inventor： CHOW HUGH ,  AHDAB AHMAD ,  CHAU RAYMOND

IPC: H03K3/03 ,  H03L7/099

Abstract: A voltage controlled oscillator comprising: a ring of inverters comprised of an odd number of serially connected CMOS inverter stages, the inverter stages being connected between first and second oppositely poled power leads, a MOSFET having a source-drain circuit connected between one of the power leads and a first power rail, the other power lead being connected to a second power rail, apparatus for operating the MOSFET in saturation, and apparatus for applying a control voltage to the gate of the MOSFET, referenced to the second power lead, whereby the MOSFET operates as a nonlinear current conduction device having a characteristic such as to linearize the voltage-frequency characteristic of the combined MOSFET - ring oscillator combination.

公开(公告)号：CA2214221A1

公开(公告)日：1998-08-24

申请号：CA2214221

申请日：1997-08-28

Applicant: ATI TECHNOLOGIES INC

Inventor： AHDAB AHMAD ,  CHOW HUGH ,  CHAU RAYMOND

IPC: H03K3/03 ,  H03L7/099

Abstract: A voltage controlled oscillator comprising: a ring of inverters comprised of an odd number of serially connected CMOS inverter stages, the inverter stages being connected between first and second oppositely poled power leads, a MOSFET having a source-drain circuit connected between one of the power leads and a first power rail, the other power lead being connected to a second power rail, apparatus for operating the MOSFET in saturation, and apparatus for applying a control voltage to the gate of the MOSFET, referenced to the second power lead, whereby the MOSFET operates as a nonlinear current conduction device having a characteristic such as to linearize the voltage-frequency characteristic of the combined MOSFET-ring oscillator combination.