Title:
FM MODULATOR
Document Type and Number:
Japanese Patent JPH05266585
Kind Code:
A
Abstract:
PURPOSE:To highly accurately control the frequency transition of the FM modulator with good reproducibility. CONSTITUTION:The frequency characteristic of an LPF is controlled based on the reference signal of a fired frequency, the output frequency of the FM modulator is detected by utilizing this frequency characteristic of the LPF and based on this detection, the frequency transition of the FM modulator is controlled. Thus, the frequency transition of the FM is controlled on the frequency of the reference signal.
Inventors:
Hiroshi Kawamoto
Tadashi Matsushima
Tadashi Matsushima
Application Number:
JP9215392A
Publication Date:
October 15, 1993
Filing Date:
March 17, 1992
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
G11B20/06; H04N5/40; H04N5/92; H04N5/922; (IPC1-7): G11B20/06; H04N5/40; H04N5/92
Attorney, Agent or Firm:
Tomio Ohinata
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