Other

Shiro Suzuki

Hiroshi Aoki

Junichi Horigome

Tetsuya Higuchi

Takayoshi Chiba

Shigeo Yamaguchi

Masahiro Murakawa

Yuji Kasai

Toshio Adachi

Shogo Kiryu

In an electronic circuit being provided with a plurality of circuit elements and performing a specified function, a plurality of specific circuit elements related to a circuit performing the specified function out of the plurality of circuit elements are composed of circuit elements changing their element parameters according to values indicated by control signals. The electronic circuit is provided with a plurality of holding circuits for holding a plurality of control signals to be given to the plurality of specific circuit elements. The values of the plurality of control signals which these holding circuits hold are changed by external or internal apparatuses according to a probabilistic searching technique (for example genetic algorithms or simulated annealing algorithms) so that the function of the electronic circuit satisfies designated specifications.

Electronic holding circuit and adjusting method thereof using a probabilistic searching technique

An A/D converter ( ) samples an analog signal synchronously with a sampling clock from a VCO ( ). These sampled values are stored in a shift register ( ). A code judging section ( ) detects the positive/negative sign pattern (time-series code pattern) of the sampled values held in storage elements (S to S ) of the shift register ( ) and stores the sampled values in predetermined register ( to ) according to the detected sign pattern. According to this, a calculating section ( ) determines the phase difference between the analog signal and the sampling clock. The phase difference is fed to a VCO ( ) through a D/A converter ( ) and a loop filter ( ).

PLL circuit

Growing community of inventors

Atsugi, Japan

Shiro Suzuki