Abstract: There is provided an information processing apparatus including an existing place information acquisition part and a my-spot information registration part. The existing place information acquisition part is configured to acquire existing place information which specifies an existing place. The my-spot information registration part is configured to acquire spot information related to a spot, which spot information is provided from a plurality of information provider devices, based on the existing place information; and to register spot information specified by a user as my-spot information, out of the acquired spot information.

Abstract: Provided is as information processing apparatus including: a counting unit configured to count the number of users who are interested in a product dealt in e-commerce transaction, performed via a network; and a control unit configured to perform control in a manner that a counting result by the counting unit is presented on a screen of the e-commerce transaction along with information of the product.

Abstract: There is provided an information processing apparatus including an existing place information acquisition part and a my-spot information registration part. The existing place information acquisition part is configured to acquire existing place information which specifies an existing place. The my-spot information registration part is configured to acquire spot information related to a spot, which spot information is provided from a plurality of information provider devices, based on the existing place information; and to register spot information specified by a user as my-spot information, out of the acquired spot information.

Abstract: A first transistor includes: a first terminal that receives one of differential input signals; a second terminal that receives a control signal for varying an impedance; a third terminal connected to the second transistor; and a fourth terminal that supplies a potential to a substrate. A second transistor includes: a fifth terminal that receives the other of the differential input signals; a sixth terminal that receives a control signal, the seventh terminal connected to the first transistor, and the eighth terminal that supplies a potential to a substrate. The third terminal, the fourth terminal, the seventh terminal, and the eighth terminal are connected together.

Abstract: A first differential pair and a second differential pair each receive differential input signals. The first differential pair and the second differential pair are connected such that the second differential pair receives part of a tail current of the first differential pair, and such that output signals of the first differential pair and output signals of the second differential pair cancel each other. A constant current source supplies the tail current to the first differential pair. A transistor which functions as a variable current source is connected between a current path and the second differential pair, and supplies a current drawn from the current path to the second differential pair, the current path connecting the first differential pair and the constant current source.

Abstract: A frequency conversion apparatus includes an SSB mixer and a signal input unit. The signal input unit includes a first input unit and a second input unit. The first input unit inputs a square wave signal to one of the input terminals of the SSB mixer. The second input unit inputs, to the other input terminal of the SSB mixer, a square wave signal that has a clock frequency an even number times that of the square wave signal input from the first input unit. According to these aspects, it is possible to reduce spurious signals with a small-scale circuit configuration.