Frequency modulation circuit using vco

Details Frequency modulation circuit using vco Frequency modulation circuit using vco

H - Electricity

03

C

332/50

H03C 3/02 (2006.01) H03C 3/09 (2006.01) H03L 7/10 (2006.01) H03L 7/107 (2006.01)

Patent

CA 2025608

A frequency modulation circuit includes a VCO which constitutes a PLL along with a loop filter which is operated by a current source. Such a frequency modulation circuit is formed in monolithic IC. When a power source of the IC is turned-on, a capacitor included in the loop filter is biased by an output voltage of a voltage follower which receives Vcc/2. Since output voltage rises in the same manner as Vcc, a center frequency of the VCO can be rapidly pulled-in a phase-locked state of the PLL. In addition, the frequency modulation circuit is provided with a V-1 conversion circuit which increases a charging current for the capacitor in response to a mute signal generated when the power source is turned-on, whereby a time constant of the loop filter is made small substantially.

Affiliated with

Also associated with

Rating

Frequency modulation circuit using vco does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Frequency modulation circuit using vco, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency modulation circuit using vco will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1365505