公开(公告)号：AU770143B2

公开(公告)日：2004-02-12

申请号：AU4054300

申请日：2000-03-28

Applicant: QUALCOMM INC

Inventor： CANTEY PATRICK S III ,  SALDANA ROLANDO A ,  PITTA THOMAS A

IPC: H03B5/08 ,  H03B5/04 ,  H03B5/12

Abstract: A multiple band voltage controlled oscillator capable of generating multiple operating frequencies, and a method of generating multiple operating frequencies, includes a tank circuit having a diode element and an impedance element with a radio frequency impedance in parallel with the diode element, a PIN diode connected across a portion of the inductance of the impedance element which selectively shorts the portion of the inductance of the impedance element when activated, a switch connected to selectively enable the PIN diode and correspondingly partially short the inductance of the impedance element, thereby scaling the radio frequency impedance of the tank circuit, and an oscillator circuit responsively connected to the PIN diode for varying the output of the voltage controlled oscillator based on the radio-frequency impedance present.

公开(公告)号：HK1043883A1

公开(公告)日：2002-09-27

申请号：HK02105350

申请日：2002-07-19

Applicant: QUALCOMM INC

Inventor： CANTEY PATRICK S III ,  SALDANA ROLANDO A ,  PITTA THOMAS A

IPC: H03B5/08 ,  H03B5/04 ,  H03B5/12 ,  H03B

Abstract: A multiple band voltage controlled oscillator capable of generating multiple operating frequencies, and a method of generating multiple operating frequencies, includes a tank circuit having a diode element and an impedance element with a radio frequency impedance in parallel with the diode element, a PIN diode connected across a portion of the inductance of the impedance element which selectively shorts the portion of the inductance of the impedance element when activated, a switch connected to selectively enable the PIN diode and correspondingly partially short the inductance of the impedance element, thereby scaling the radio frequency impedance of the tank circuit, and an oscillator circuit responsively connected to the PIN diode for varying the output of the voltage controlled oscillator based on the radio-frequency impedance present.

公开(公告)号：AU4054300A

公开(公告)日：2000-10-16

申请号：AU4054300

申请日：2000-03-28

Applicant: QUALCOMM INC

Inventor： CANTEY PATRICK S III ,  SALDANA ROLANDO A ,  PITTA THOMAS A

IPC: H03B5/08 ,  H03B5/04 ,  H03B5/12

Abstract: A multiple band voltage controlled oscillator capable of generating multiple operating frequencies, and a method of generating multiple operating frequencies, includes a tank circuit having a diode element and an impedance element with a radio frequency impedance in parallel with the diode element, a PIN diode connected across a portion of the inductance of the impedance element which selectively shorts the portion of the inductance of the impedance element when activated, a switch connected to selectively enable the PIN diode and correspondingly partially short the inductance of the impedance element, thereby scaling the radio frequency impedance of the tank circuit, and an oscillator circuit responsively connected to the PIN diode for varying the output of the voltage controlled oscillator based on the radio-frequency impedance present.

公开(公告)号：CA2368011A1

公开(公告)日：2000-10-05

申请号：CA2368011

申请日：2000-03-28

Applicant: QUALCOMM INC

Inventor： PITTA THOMAS A ,  SALDANA ROLANDO A ,  CANTEY PATRICK S III

IPC: H03B5/08 ,  H03B5/04 ,  H03B5/12

Abstract: A voltage controlled oscillator (10) can operate in multiple frequency bands . One or more PIN diodes (20) are connected parallel to inductances (38) and selectively shorts them out. This selectively scales the RF impedance of the tank circuit (16), thereby applying the correct voltages for oscillator (24) to produce the correct frequencies.