Abstract: A counter with air conditioning and freezing system includes a self-supporting structure (C) with a housing and a support for trays (A, B), an insulated exterior air conditioning and freezing system (D) with thermally insulated columns (D1) which extend from the self-supporting structure (C), and a thermally insulated horizontal conduit (D2), a longitudinal groove (D3) oriented towards the housing to allow the exit of air and an exterior plate (D4) to control the exit direction of the air. It includes an insulated interior air conditioning and freezing system (R) to direct an air current through the interior of the self-supporting structure (C) and which comprises a frontal return opening (R1) which connects to conduits redirecting the air towards a grill (R9) from the interior of the housing and towards the insulated exterior air conditioning and freezing system (D).

Abstract: A counter with air conditioning and freezing system includes a self-supporting structure (C) with a housing and a support for trays (A, B), an insulated exterior air conditioning and freezing system (D) with thermally insulated columns (D1) which extend from the self-supporting structure (C), and a thermally insulated horizontal conduit (D2), a longitudinal groove (D3) oriented towards the housing to allow the exit of air and an exterior plate (D4) to control the exit direction of the air. It includes an insulated interior air conditioning and freezing system (R) to direct an air current through the interior of the self-supporting structure (C) and which comprises a frontal return opening (R1) which connects to conduits redirecting the air towards a grill (R9) from the interior of the housing and towards the insulated exterior air conditioning and freezing system (D).

Abstract: A PIN diode antenna RF switch especially suited for a multi-mode transceiver that includes a full duplex mode such as an AMPS analog mobile telephone. Six PIN diodes (30, 32, 34, 36, 42, 46) are configured as RF switches which are controlled by an arrangement of four DC switches (60,64,68,72) to produce a high degree of isolation in a path parallel to a duplexer (52) and low insertion loss in transmitting modes while optimizing current drain.

Abstract: A frequency multiplier (120) having a tunable resonant circuit (122), is anticipated for use with a frequency synthesizer (100) having a Voltage Controlled Oscillator (110). The VCO control line (116) voltage establishes the VCO (110) fundamental frequency (.function.o) as well as the resonant circuit (122) center frequency, such that the resonant circuit (122) frequency response will track a desired harmonic component within the multiplier output (130) even as the VCO control line (116) voltage and the fundamental frequency (.function.o) change in response to control line variation.

Abstract: A frequency multiplier (120) having a tunable resonant circuit (122), is anticipated for use with a frequency synthesizer (100) having a Voltage Controlled Oscillator (110). The VCO control line (116) voltage establishes the VCO (110) fundamental frequency (.function..sub.o) as well as the resonant circuit (122) center frequency, such that the resonant circuit (122) frequency response will track a desired harmonic component within the multiplier output (130) even as the VCO control line (116) voltage and the fundamental frequency (.function..sub.o) change in response to control line variation.