Title:
回路装置
Document Type and Number:
Japanese Patent JP3874428
Kind Code:
B2
Abstract:
A circuit arrangement is provided with a controlled switch which is controlled by means of a periodic switching signal for operating an oscillation circuit at a frequency f, and with a control circuit for generating the periodic switching signal. The control circuit comprises a pulse width generator for generating a periodic square wave signal with a half cycle duration which is adjustable in steps of a value T and which has a value of at least t. The circuit arrangement is characterized in that, with 2*(t+N1*T)<1/f<2*(t+(N1+1)*T) in which N1 is an integer number, the periodic switching signal is built up from a repetitive chain of square wave signals with a repetition cycle which comprises n1 half cycles of a duration t+N1*T and n2 half cycles of a duration t+N2*T, wherein N2 is >N1 and is an integer number.
Inventors:
Thea Bogto Bernardus Johannes
Slegels France
Slegels France
Application Number:
JP52856198A
Publication Date:
January 31, 2007
Filing Date:
September 26, 1997
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
H02M7/48; H02M7/527; H05B41/288; H05B41/38
Domestic Patent References:
| JP7226657A | ||||
| JP7170160A |
Foreign References:
| EP0708579A1 |
Attorney, Agent or Firm:
Susumu Tsugaru
Masao Sawada
Masao Sawada