Oblon, Spivak, McClelland, Maier & Neustadt
Low-frequency converter for carrier chrominance signal
 A first PLL circuit receives a color burst signal of a carrier chrominance signal and outputs a first continuous wave signal which is identical in frequency and phase to the color burst signal. The first continuous wave signal is frequency converted by a first frequency divider and a second PLL circuit into a second continuous wave signal having a frequency of the sum of or difference between frequencies of the carrier chrominance signal and a derived low-frequency conversion chrominance signal. A multiplier multiplies the carrier chrominance signal by the second continuous wave signal. An output signal from the multiplier is supplied to an extraction circuit to obtain the low-frequency conversion chrominance signal. 
Mitsubishi Denki Kabushiki Kaisha
H H
H03L H04N
inventional inventional
Hiromitsu
Yamashita