Special Section on Analog Circuit Techniques and Computer Aided Design
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 . FOREWORD ........................................................ 151
        Hisashi YAMADA

PAPERS
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 . Availability of the Overlapped Block Relaxation Newton Method for
   Nonlinear Large Scale Circuit Simulation ........................ 152
        Nobuyuki TANAKA, Yoshimitsu ARAI, Satoru YAMAGUCHI and Hisashi
        TOMIMURO

 . Development of Module Generators from Extracted Design Procedures
   --Application to Analog Device Generation-- ..................... 160
        Takashi MORIE, Hidetoshi ONODERA and Keikichi TAMARU

 . Compaction with Shape Optimization and Its Application to Layout
   Recycling ....................................................... 169
        Kazuhisa OKADA, Hidetoshi ONODERA and Keikichi TAMARU

 . A Drive of Input and Output Impedance Effects of Functional Blocks
   into a Frequency Shift of Active Circuits ....................... 177
        Kazuyuki WADA, Nobuo FUJII and Shigetaka TAKAGI

 . A Constructive Linearization Method for Transistor Circuits ..... 185
        Tsutomu SUGAWARA

LETTERS
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 . A High Slew Rate Operational Amplifier for an LCD Driver IC ..... 191
        Tetsuro ITAKURA

 . A Voltage Controlled Astable Multivibrator with Miller-Integrator
            ........................................................ 196
        Hirofumi SASAKI, Kuniaki FUJIMOTO and Mitsutoshi YAHARA

Regular Section
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PAPERS
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[Digital Signal Processing]

 . Adaptive Density Pulse Excitation for Low Bit Rate Speech Coding  199
        Masami AKAMINE and Kimio MISEKI

 . The Optimum Approximation of Multi-Dimensional Signals Based on the
   Quantized Sample Values of Transformed Signals .................. 208
        Takuro KIDA

[Information Security and Cryptography]

 . Relationships among Nonlinearity Criteria of Boolean Functions .. 235
        Shouichi HIROSE and Katsuo IKEDA

[Nonlinear Circuits and Systems]

 . Synchronization Phenomena in Oscillators Coupled by One Resistor  244
        Seiichiro MORO, Yoshifumi NISHIO and Shinsaku MORI

LETTERS
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[Adaptive Signal Processing]

 . A Time Varying Step Size Normalized LMS Algorithm for Adaptive Echo
   Canceler Structures ............................................. 254
        Mariko NAKANO MIYATAKE, Hector PEREZ MEANA, Luis NIN~O de
        RIVERA-O., Fausto CASCO SANCHEZ and Juan Carlos SANCHEZ GARCIA

[Neural Networks]

 . Design and Implementations of a Learning T-Model Neural Network . 259
        Zheng TANG and Okihiko ISHIZUKA

[Numerical Analysis and Self-Validation]

 . Finding All Solutions of Piecewise-Linear Resistive Circuits
   Containing Nonseparable Transistor Models ....................... 264
        Kiyotaka YAMAMURA and Osamu MATSUMOTO

[Optimization Techniques]

 . Equivalence between Some Dynamical Systems for Optimization ..... 268
        Kiichi URAHAMA

[Spread Spectrum Technology]

 . An Effect on Chip Interleaving and Hard Limiter against Burst Noise
   in Direct Sequence Spread Spectrum Communication Systems ........ 272
        Shin'ichi TACHIKAWA

 . Errata (Vol.E77-A, No.12 Letter: T. MORIYA) ..................... 277
 . ABSTRACTSiIEICE Trans., Vol.J78-A, No.2 in Japanese) ........... 278