Abstract: A breeding support system including at least one information terminal for processing breeding information associated with breeding work of at least one individual breeding object, the system comprising: individual information collecting means for collecting individual information indicating a time-variable change of an individual condition of the individual breeding object; specified breeding work requirement determination means for determining a requirement for a specified breeding work from among all breeding work in accordance with a profile of the time-variable change of the individual condition; breeding guidance generation means for generating at least one breeding guidance announcing a requirement of the specified breeding work determined; and breeding guidance supply means for supplying the generated breeding guidance as the breeding information to the information terminal.

Abstract: A noise-bar period detection circuit detects a noise bar period in response to a low-frequency carrier wave FM signal contained in a signal reproduced by a video head when a video tape is reproduced in a special mode so as to output a noise-bar detection signal. A reproduced-signal processing circuit including a clamp circuit, an AGC circuit and the like maintains normal voltage immediately before the noise bar period in response to the noise-bar detection signal output from the noise-bar period detection circuit. Therefore, restoration to a normal state can be performed immediately after the noise bar period.

Abstract: A filter circuit having a signal input terminal and a signal output terminal includes a first and a second buffer. The first buffer has an input end connected to a first resistor and to a first capacitor. A second capacitor having one end is connected to an output end of the first buffer. A second resistor having one end is connected to the signal input terminal. The second buffer has an input end connected to the other end of the second resistor and to the other end of the second capacitor, and an output end connected to the signal output terminal. The filter circuit also includes a first signal supply circuit and a second signal supply circuit. The first signal supply circuit supplies a signal proportional to a difference between an output signal of the second buffer and a signal inputted from the signal input terminal, to the input end of the first buffer through the first resistor.

Abstract: A luminance signal/color signal separator circuit having an input terminal and luminance and color output terminals includes a comb filter connected between the input terminal and the color output terminal; an amplitude detector having an input connected to the color output terminal; a filter having a first input connected to the input terminal and a second input connected to an output of the amplitude detector; and a combiner having an output connected to the luminance output terminal, a first input connected to the input terminal and a second input connected to an output of the filter. The separator circuit processes a composite signal which includes an original luminance signal and an original color signal. The filter passes a gain controlled color band signal.

Abstract: An active filter comprises a differential-type voltage-controlled current source. A first resistor is connected between the first input terminal of the voltage-controlled current source and a first signal source. A second resistor is connected between the second input terminal of the voltage-controlled current source and the second signal source (or the output terminal of the voltage-controlled current source). The incremental transfer conductance gm of the filter becomes smaller by R.sub.2 /(R.sub.1 +R.sub.2) compared to that of an active filter which does not contain the first and the second resistors of the active filter of the invention, where R.sub.1 and R.sub.2 are resistance values of the first and the second resistors, respectively.

Abstract: A first operational amplifier differentially operates a signal to be adjusted input by an input unit and an adjusted signal output by an output unit. A second operational amplifier differentially operates a first output from the first operational amplifier and the adjusted signal. A buffer supplies a second output from the second operational amplifier to the output unit as the adjusted signal. A first adder obtains a sum component of a first signal obtained by multiplying a first variable m with the signal to be adjusted and a second signal obtained by multiplying a second variable 1-n with the adjusted signal. A first capacitor superposes the sum component of the first and second signals on the first output to supply a superposed signal to the second operational amplifier. A second adder obtains the signal to be adjusted or a component obtained by multiplying the first variable m with the signal to be adjusted as a third signal.

Abstract: A first operational amplifier (OP AMP) is connected at the positive input terminal to a signal input terminal. The positive output terminal of the first OP AMP is connected to a ground through a first capacitor, and to the positive input terminal of a second OP AMP. The positive output terminal of the second OP AMP is connected to positive input terminal of the first OP AMP via a second capacitor, and to the input terminal of a buffer. The output terminal of the buffer is connected to the negative input terminal of the first OP AMP, and to the positive input terminal of the first OP AMP via the connected series of the first and second resistors. The connection point of these resistors is connected to the negative input terminal of the second OP AMP. The output terminal of the buffer is connected to a signal output terminal. When the resistances of these resistors are equal, the circuit has a phase equalizer characteristic.