Abstract: A harmonic gear drive includes: a rigid spline; a flexspline including an attachment portion, teeth, and a thin-walled flexible portion provided between the attachment portion and the teeth; and a member attached to the thin-walled flexible portion. The member is made of a material whose elastic modulus is lower than that of the flexspline.

Abstract: An AM receiver circuit comprises an IF intensity detection section which detects intensity of a carrier wave of an IF signal and outputs an IF signal carrier wave intensity signal in accordance with the detected intensity. The IF intensity detection section extracts the carrier wave frequency component of the IF signal using a BPF, and converts the extracted intensity of the IF signal carrier wave intensity into a direct current signal using an integrator, to thereby obtain the IF signal carrier wave intensity signal. A sound compensation section, which serves to compensate sound quality of an audio signal output from an AM detection section, performs sound quality compensation based on the IF signal carrier wave intensity signal when the received field intensity is low. In this manner, appropriate sound quality compensation can be performed even when the received broadcast wave field intensity is low.

Abstract: An AM radio receiving circuit is disclosed that comprises a front end circuit that converts an input AM modulation signal to an intermediate frequency signal that in turn is output; a pulse noise detecting circuit that detects pulse noise included in the AM modulation signal; a pulse noise removing circuit that removes the pulse noise included in the intermediate frequency signal output from the front end circuit based on the detection result of the pulse noise detecting circuit to output the signal; and a detecting circuit that detects the intermediate frequency signal output from the pulse noise removing circuit after removing the pulse noise to output an audio signal.

Abstract: A diversity receiving apparatus receives first and second reception signals and is constituted by including one or more phase shifters that generate one or more third signals having phases different from the second reception signal based on the second reception signal, a correlation calculator that obtains a correlation between the first reception signal and each of the second reception signal and the third reception signals, a correlation comparator that selects the reception signal having the highest correlation with the first reception signal from the second reception signal and the third reception signals, a selector that selects and outputs the second reception signal or the third reception signal selected by the correlation comparator; and a combining device that outputs a signal formed by combining the first reception signal and the reception signal output from the selector.

Abstract: An AM receiver circuit comprises an IF intensity detection section which detects intensity of a carrier wave of an IF signal and outputs an IF signal carrier wave intensity signal in accordance with the detected intensity. The IF intensity detection section extracts the carrier wave frequency component of the IF signal using a BPF, and converts the extracted intensity of the IF signal carrier wave intensity into a direct current signal using an integrator, to thereby obtain the IF signal carrier wave intensity signal. A sound compensation section, which serves to compensate sound quality of an audio signal output from an AM detection section, performs sound quality compensation based on the IF signal carrier wave intensity signal when the received field intensity is low. In this manner, appropriate sound quality compensation can be performed even when the received broadcast wave field intensity is low.

Abstract: A signal processing circuit for a tuner has a detector band pass filter for extracting a carrier of an intermediate frequency signal, a frequency counter for counting, based on a clock signal, a frequency of a carrier of the intermediate frequency signal which passes through the detector band pass filter, and an intermediate frequency variation signal outputting section for outputting an intermediate frequency variation signal based on a difference between the counted frequency and a frequency of the clock signal. Based on the intermediate frequency variation signal, a frequency selection characteristic of an intermediate frequency band pass filter, a signal detector, an adjacent interference detector, or an S-meter-band pass filter are controlled.

Abstract: A roll-blind including a winding roll for winding up a blind cloth and a coil spring contained in said winding roll to rotate it in the cloth winding-up direction, which comprises a mechanism for reducing the rotating speed of said winding roll at the time of winding up the blind cloth.

Abstract: A device for driving and stopping a roll blind including a blind cloth and a winding roll for winding up and unwinding the blind coth, which includes a clutch mechanism which is actuated to its ON- and OFF-positions by drawing the blind cloth downward. In the cloth lowering operation the clutch mechanism is held in ON-position in order to stop the blind cloth at a desired position and in the cloth raising operation the clutch mechanism is actuated to the OFF-position by slightly drawing the blind cloth downward, thereby allowing the blind cloth onto the winding roll.