Title:
オシレータ回路等の電子デバイスによって生成される交流信号の振幅制御
Document Type and Number:
Japanese Patent JP4031630
Kind Code:
B2
Abstract:
There is described an amplitude-controlled electronic device (1) intended to generate at an output (11; 11a) an alternating output signal (S1; Sosc) of substantially constant amplitude. This electronic device includes a measuring branch (20; 20*; 201) for generating a measuring voltage (Vout) representative of the amplitude of the output signal (S1; Sosc) and means for generating a reference voltage (Vref) including a reference branch (40; 40*; 400) matched with the measuring branch and at the input (A) of which a voltage reference (U0) is selectively switched. A comparator (30; 300) is arranged for comparing the measuring and reference voltages and generating in response a control signal (Sc) which is applied on a control terminal (12) of the electronic device. According to the invention, the matching of the measuring and reference branches allows the sensitivity of the control signal to temperature and manufacturing process variations to be substantially cancelled.
Inventors:
Arnaud Casa Grande
Application Number:
JP2001317953A
Publication Date:
January 09, 2008
Filing Date:
October 16, 2001
Export Citation:
Assignee:
ASULAB SOCIETA ANONYME
International Classes:
H03G11/00; H03G3/30
Domestic Patent References:
| JP7501679A | ||||
| JP5231969A | ||||
| JP3190405A | ||||
| JP6013897A |
Foreign References:
| US3828270 | ||||
| US4083237 |
Attorney, Agent or Firm:
Masaki Yamakawa