公开(公告)号：NO20002277L

公开(公告)日：2000-06-29

申请号：NO20002277

申请日：2000-04-28

Applicant: ERICSSON TELEFON AB L M

Inventor： GORDENFORS TORBJOERN ,  BENGTSSON ERIK ,  ENSTROEM HOKAN

IPC: H03B5/32 ,  H03B5/04 ,  H03B5/36 ,  H03L1/02 ,  H03L5/00

Abstract: A highly stable single chip crystal controlled oscillator with automatic gain control. An amplitude detector monitors the output of a crystal controlled oscillator amplifier and produces a feedback signal proportional to the output signal of the amplifier to ensure oscillation is induced at startup and that the amplitude of oscillation is limited to a preselected value during operation to conserve power consumption by the amplifier. The capacitor tank circuit connected to the input of the amplifier includes a voltage variable capacitor the voltage across which is initially established at manufacture to tune the oscillation frequency to a preselected value. The voltage across the voltage variable capacitor is also adjusted to compensate for temperature variations in the circuit.

公开(公告)号：NO20002277A

公开(公告)日：2000-06-29

申请号：NO20002277

申请日：2000-04-28

Applicant: ERICSSON TELEFON AB L M

Inventor： GORDENFORS TORBJOERN ,  BENGTSSON ERIK ,  ENSTROEM HOKAN

IPC: H03B5/32 ,  H03B5/04 ,  H03B5/36 ,  H03L1/02 ,  H03L5/00

CPC classification number: H03L5/00 ,  H03B5/368 ,  H03L1/025

公开(公告)号：NO20002277D0

公开(公告)日：2000-04-28

申请号：NO20002277

申请日：2000-04-28

Applicant: ERICSSON TELEFON AB L M

Inventor： GORDENFORS TORBJOERN ,  BENGTSSON ERIK ,  ENSTROEM HOKAN

IPC: H03B5/32 ,  H03B5/04 ,  H03B5/36 ,  H03L1/02 ,  H03L5/00 ,  H03B

Abstract: A highly stable single chip crystal controlled oscillator with automatic gain control. An amplitude detector monitors the output of a crystal controlled oscillator amplifier and produces a feedback signal proportional to the output signal of the amplifier to ensure oscillation is induced at startup and that the amplitude of oscillation is limited to a preselected value during operation to conserve power consumption by the amplifier. The capacitor tank circuit connected to the input of the amplifier includes a voltage variable capacitor the voltage across which is initially established at manufacture to tune the oscillation frequency to a preselected value. The voltage across the voltage variable capacitor is also adjusted to compensate for temperature variations in the circuit.